[Bug]: 3rd party app breaks entire appstore

⚠️ 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

the 3rd party app allinoneaccessibility from skynettechnologies breaks my entire app store in my nextcloud instance, although i have not installed the app, no other app can be viewed/installed/enabled/disabled in the appstore anymore, a misconfigured app should not be able to break the whole appstore

there is already a issue created at the devs repository of the nextcloud app:
https://github.com/skynettechnologies/skynettechnologiesallinoneaccessibility/issues/3

Steps to reproduce

1. install/update nextcloud server 34.0.1
2. go to apps
3. error message "app list can not be loaded, try again later", no apps are shown

Expected behavior

appstore is working correctly, the misconfigured app should not be listed in the appstore

Nextcloud Server version

34

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.4

Web server

Apache (supported)

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?

Encryption is Disabled

What user-backends are you using?

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

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

No response

No source files or tests are named. Start by reproducing the failure on Nextcloud Server 34.0.1 with the referenced third-party app present, then inspect the app-store error and server logs to locate the failing boundary. Done means the app store can list, install, enable, and disable apps despite the misconfigured app.