[Bug]: "Add group" in user management broken

[mejo-]

⚠️ 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 (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• Nextcloud Server is running on 64bit capable CPU, PHP and OS.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

On latest master (Nextcloud 27), the "Add group" button doesn't work. When entering a group name and submitting, nothing happens. Also no error log in the console and no network request is triggered.

Steps to reproduce

1. Go to /index.php/settings/users as admin
2. Press the "+ Add group" button in the left panel
3. Type a group name and press the submit button

Expected behavior

A new group should be created.

Installation method

None

Nextcloud Server version

master

Operating system

Debian/Ubuntu

PHP engine version

None

Web server

None

Database engine version

MariaDB

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

Not relevant

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

[szaimen]

Cc @nextcloud/server-frontend

[artonge]

@fenn-cs Could it be linked to https://github.com/nextcloud/server/pull/38202/files?

[nfebe]

@artonge I would look into this now.

[mejo-]

How about adding Cypress tests for things like that to prevent regressions in the future?

[artonge]

How about adding Cypress tests for things like that to prevent regressions in the future?

Cypress tests are always welcome. skjnldsv added the possibility to add some in the server recently