Can't open problem in admin interface

[Schnuecks]

Describe the bug unable to open problems in admin interface

To Reproduce Steps to reproduce the behavior:

1. Go to 'admin'
2. Click on 'problems.'
3. See error

We're sorry, but something went wrong. If you are the application owner check the logs for more information.

GET https://3dprint.home.lan/admin/problems 500 (Internal Server Error)

Expected behavior the problem tab opens

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [Windows]
• Browserchrome,
• Version [121]

Add any other context about the problem here.

[Floppy]

Thanks! I've had this problem for a while, I've got a fix on the back burner in #1783. Thanks for logging it!