[Bug]: Nextcloud inaccessible with erroneous LDAP configuration

[hamza221]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

With an erroneous LDAP configuration Nextcloud becomes inaccessible even to local admin

Steps to reproduce

1. Have an instance with an ldap configuration
2. Remove %uid from ldapLoginFilter
3. Nextcloud becomes inaccessible

Expected behavior

Nextcloud is still accessible for local users even with an erroneous LDAP configuration

Installation method

None

Nextcloud Server version

28

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response