[Bug]: 代码片段没加载

[anganing]

Describe the bug

更新后，今天打开突然没数据，还以为是丢失了。但是数据文件还是在的：

To reproduce

1. Go to ...
2. Click on ...
3. Scroll down to ..
4. See error

Version

3.11.0

OS

windwos11

Validations

• Follow our Code of Conduct
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.

[Mc-GrowlR]

me too

[antonreshetov]

Please describe the bug in English so that at least people can read it.

[redsparrowWang]

@antonreshetov

The design and usability are both very good for this application. However, whenever it reads a blank entry, the console shows similar errors. When performing an add operation, it throws an error like http://localhost:3033/folders net::ERR_CONNECTION_REFUSED. This might be an Electron issue. What could be the reason that the local API on port 3033 cannot be accessed?

Additionally, does this application need to access m.masscode.io to run?
I saw an output like this: m.masscode.io/api/event:1 Failed to load resource: net::ERR_CONNECTION_TIMED_OUT

localhost:3033/folders:1 Failed to load resource: net::ERR_CONNECTION_REFUSED
index.25cae1b0.js:12 Uncaught (in promise) TypeError: Cannot read properties of null (reading 'filter')
    at Proxy.getFolders (index.25cae1b0.js:12)
    at async index.25cae1b0.js:2082
m.masscode.io/api/event:1 Failed to load resource: net::ERR_CONNECTION_TIMED_OUT
index.25cae1b0.js:12 Uncaught (in promise) Error: Network Error
    at GL (index.25cae1b0.js:12)
    at XMLHttpRequest.h.onerror (index.25cae1b0.js:13)
DevTools failed to load source map: Could not parse content for file:///preload.js.map: Unexpected end of JSON input
2DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///app.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///core.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///ajv.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///boolSchema.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///errors.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///code.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///scope.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///util.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///names.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///dataType.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///rules.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///applicability.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///defaults.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///keyword.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///code.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///subschema.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///resolve.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///uri.all.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///validation_error.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///ref_error.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///draft7.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///id.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///ref.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///limitNumber.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///multipleOf.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///limitLength.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///ucs2length.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///pattern.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///limitProperties.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///required.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///limitItems.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///uniqueItems.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///equal.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///const.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///enum.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///additionalItems.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///prefixItems.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///items.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///items2020.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///contains.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///dependencies.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///propertyNames.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///additionalProperties.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///properties.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///patternProperties.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///not.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///anyOf.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///oneOf.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///allOf.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///if.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///thenElse.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///format.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///metadata.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///types.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///formats.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///limit.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///ajv.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///core.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///boolSchema.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///errors.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///code.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///scope.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///util.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///names.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///dataType.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///rules.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///applicability.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///defaults.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///keyword.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///code.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///subschema.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///resolve.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///validation_error.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///ref_error.js.map: Unexpected end of JSON input
2DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///draft7.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///id.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///ref.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///limitNumber.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///multipleOf.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///limitLength.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///ucs2length.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///pattern.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///limitProperties.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///required.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///limitItems.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///uniqueItems.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///equal.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///const.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///enum.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///additionalItems.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///prefixItems.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///items.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///items2020.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///contains.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///dependencies.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///propertyNames.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///additionalProperties.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///properties.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///patternProperties.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///not.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///anyOf.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///oneOf.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///allOf.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///if.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///thenElse.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///format.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///metadata.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///types.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///preferences.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///languages.js.map: Unexpected end of JSON input
2DevTools failed to load source map: Could not parse content for file:///index.js.map: Unexpected end of JSON input
DevTools failed to load source map: Could not parse content for file:///language.js.map: Unexpected end of JSON input
index.25cae1b0.js:12 POST http://localhost:3033/folders net::ERR_CONNECTION_REFUSED
(anonymous) @ index.25cae1b0.js:12
me @ index.25cae1b0.js:12
setTimeout (async)
UX @ index.25cae1b0.js:12
r @ index.25cae1b0.js:12
addNewFolder @ index.25cae1b0.js:12
(anonymous) @ index.25cae1b0.js:8
ZL @ index.25cae1b0.js:13
Fp @ index.25cae1b0.js:4
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:12 GET http://localhost:3033/folders net::ERR_CONNECTION_REFUSED
(anonymous) @ index.25cae1b0.js:12
me @ index.25cae1b0.js:12
setTimeout (async)
UX @ index.25cae1b0.js:12
r @ index.25cae1b0.js:12
getFolders @ index.25cae1b0.js:12
(anonymous) @ index.25cae1b0.js:8
addNewFolder @ index.25cae1b0.js:12
await in addNewFolder (async)
(anonymous) @ index.25cae1b0.js:8
ZL @ index.25cae1b0.js:13
Fp @ index.25cae1b0.js:4
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:4 TypeError: Cannot read properties of null (reading 'filter')
    at Proxy.getFolders (index.25cae1b0.js:12)
    at async Proxy.addNewFolder (index.25cae1b0.js:12)
    at async ZL (index.25cae1b0.js:13)
rK @ index.25cae1b0.js:4
C4 @ index.25cae1b0.js:4
(anonymous) @ index.25cae1b0.js:4
Promise.catch (async)
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:12 POST http://localhost:3033/folders net::ERR_CONNECTION_REFUSED
(anonymous) @ index.25cae1b0.js:12
me @ index.25cae1b0.js:12
setTimeout (async)
UX @ index.25cae1b0.js:12
r @ index.25cae1b0.js:12
addNewFolder @ index.25cae1b0.js:12
(anonymous) @ index.25cae1b0.js:8
ZL @ index.25cae1b0.js:13
Fp @ index.25cae1b0.js:4
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:12 POST http://localhost:3033/folders net::ERR_CONNECTION_REFUSED
(anonymous) @ index.25cae1b0.js:12
me @ index.25cae1b0.js:12
setTimeout (async)
UX @ index.25cae1b0.js:12
r @ index.25cae1b0.js:12
addNewFolder @ index.25cae1b0.js:12
(anonymous) @ index.25cae1b0.js:8
ZL @ index.25cae1b0.js:13
Fp @ index.25cae1b0.js:4
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:12 POST http://localhost:3033/folders net::ERR_CONNECTION_REFUSED
(anonymous) @ index.25cae1b0.js:12
me @ index.25cae1b0.js:12
setTimeout (async)
UX @ index.25cae1b0.js:12
r @ index.25cae1b0.js:12
addNewFolder @ index.25cae1b0.js:12
(anonymous) @ index.25cae1b0.js:8
ZL @ index.25cae1b0.js:13
Fp @ index.25cae1b0.js:4
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:12 POST http://localhost:3033/folders net::ERR_CONNECTION_REFUSED
(anonymous) @ index.25cae1b0.js:12
me @ index.25cae1b0.js:12
setTimeout (async)
UX @ index.25cae1b0.js:12
r @ index.25cae1b0.js:12
addNewFolder @ index.25cae1b0.js:12
(anonymous) @ index.25cae1b0.js:8
ZL @ index.25cae1b0.js:13
Fp @ index.25cae1b0.js:4
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:12 GET http://localhost:3033/folders net::ERR_CONNECTION_REFUSED
(anonymous) @ index.25cae1b0.js:12
me @ index.25cae1b0.js:12
setTimeout (async)
UX @ index.25cae1b0.js:12
r @ index.25cae1b0.js:12
getFolders @ index.25cae1b0.js:12
(anonymous) @ index.25cae1b0.js:8
addNewFolder @ index.25cae1b0.js:12
await in addNewFolder (async)
(anonymous) @ index.25cae1b0.js:8
ZL @ index.25cae1b0.js:13
Fp @ index.25cae1b0.js:4
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:4 TypeError: Cannot read properties of null (reading 'filter')
    at Proxy.getFolders (index.25cae1b0.js:12)
    at async Proxy.addNewFolder (index.25cae1b0.js:12)
    at async ZL (index.25cae1b0.js:13)
rK @ index.25cae1b0.js:4
C4 @ index.25cae1b0.js:4
(anonymous) @ index.25cae1b0.js:4
Promise.catch (async)
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:12 GET http://localhost:3033/folders net::ERR_CONNECTION_REFUSED
(anonymous) @ index.25cae1b0.js:12
me @ index.25cae1b0.js:12
setTimeout (async)
UX @ index.25cae1b0.js:12
r @ index.25cae1b0.js:12
getFolders @ index.25cae1b0.js:12
(anonymous) @ index.25cae1b0.js:8
addNewFolder @ index.25cae1b0.js:12
await in addNewFolder (async)
(anonymous) @ index.25cae1b0.js:8
ZL @ index.25cae1b0.js:13
Fp @ index.25cae1b0.js:4
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:4 TypeError: Cannot read properties of null (reading 'filter')
    at Proxy.getFolders (index.25cae1b0.js:12)
    at async Proxy.addNewFolder (index.25cae1b0.js:12)
    at async ZL (index.25cae1b0.js:13)
rK @ index.25cae1b0.js:4
C4 @ index.25cae1b0.js:4
(anonymous) @ index.25cae1b0.js:4
Promise.catch (async)
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:12 GET http://localhost:3033/folders net::ERR_CONNECTION_REFUSED
(anonymous) @ index.25cae1b0.js:12
me @ index.25cae1b0.js:12
setTimeout (async)
UX @ index.25cae1b0.js:12
r @ index.25cae1b0.js:12
getFolders @ index.25cae1b0.js:12
(anonymous) @ index.25cae1b0.js:8
addNewFolder @ index.25cae1b0.js:12
await in addNewFolder (async)
(anonymous) @ index.25cae1b0.js:8
ZL @ index.25cae1b0.js:13
Fp @ index.25cae1b0.js:4
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:4 TypeError: Cannot read properties of null (reading 'filter')
    at Proxy.getFolders (index.25cae1b0.js:12)
    at async Proxy.addNewFolder (index.25cae1b0.js:12)
    at async ZL (index.25cae1b0.js:13)
rK @ index.25cae1b0.js:4
C4 @ index.25cae1b0.js:4
(anonymous) @ index.25cae1b0.js:4
Promise.catch (async)
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:12 GET http://localhost:3033/folders net::ERR_CONNECTION_REFUSED
(anonymous) @ index.25cae1b0.js:12
me @ index.25cae1b0.js:12
setTimeout (async)
UX @ index.25cae1b0.js:12
r @ index.25cae1b0.js:12
getFolders @ index.25cae1b0.js:12
(anonymous) @ index.25cae1b0.js:8
addNewFolder @ index.25cae1b0.js:12
await in addNewFolder (async)
(anonymous) @ index.25cae1b0.js:8
ZL @ index.25cae1b0.js:13
Fp @ index.25cae1b0.js:4
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4
index.25cae1b0.js:4 TypeError: Cannot read properties of null (reading 'filter')
    at Proxy.getFolders (index.25cae1b0.js:12)
    at async Proxy.addNewFolder (index.25cae1b0.js:12)
    at async ZL (index.25cae1b0.js:13)
rK @ index.25cae1b0.js:4
C4 @ index.25cae1b0.js:4
(anonymous) @ index.25cae1b0.js:4
Promise.catch (async)
nd @ index.25cae1b0.js:4
n @ index.25cae1b0.js:4

PS C:\Users\> netstat -ano | findstr :3033
PS C:\Users\>
PS C:\Users\>
PS C:\Users\> Get-Process -Id (Get-NetTCPConnection -LocalPort 3033).OwningProcess
Get-NetTCPConnection : Cannot find any MSFT_NetTCPConnection object with "LocalPort" property equal to "3033". Please verify the property value and try again.
At line:1 char:18
+ Get-Process -Id (Get-NetTCPConnection -LocalPort 3033).OwningProcess
+                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (3033:UInt16) [Get-NetTCPConnection], CimJobException
    + FullyQualifiedErrorId : CmdletizationQuery_NotFound_LocalPort,Get-NetTCPConnection

Get-Process : Cannot bind argument to parameter 'Id' because it is null.
At line:1 char:17
+ Get-Process -Id (Get-NetTCPConnection -LocalPort 3033).OwningProcess
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidData: (:) [Get-Process], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.GetProcessC
   ommand

PS C:\Users\> $proc = Get-NetTCPConnection -LocalPort 3033 -ErrorAction SilentlyContinue
PS C:\Users\> if ($proc) {
>>     Get-Process -Id $proc.OwningProcess
>> } else {
>>     Write-Output "Port 3033 is not in use"
>> }
Port 3033 is not in use
PS C:\Users\>