fix(errorHandling): adjust general error handler

[Phil91]

Description

fixing the current error handling

Why

after the net 9 upgrade the general error handling was broken and always returned a 500

Issue

N/A

Checklist

• I have performed a self-review of my own code
• I have successfully tested my changes locally
• I have added tests that prove my changes work
• I have checked that new and existing tests pass locally with my changes
• I have commented my code, particularly in hard-to-understand areas
• I have added copyright and license headers, footers (for .md files) or files (for images)