Form Finisher "Redirect to Page" throws Error "Class '0;' not found"

Hello everybody,
I’m fairly new to Typo3 and I have just made my first form - the problem is, when I use the form finisher “redirect to page” it throws an Error “Class ‘0;’ not found” when I submit the form. Apparently the error is in the file GeneralUtility.php at the line 3220
Every other Form Finisher is working just fine.

I have asked multiple people who work with Typo3 and none of them had an idea what I should do to fix this, I was hoping somebody here maybe has an idea…
Thanks in advance :slight_smile:

Typo3 Version is 11.5.22