Chronoforms 7, PHP 8 and Joomla 4 - can't edit fields and forms, gear is spnning and spinning

Hey there, moved a joomla 4 installation from my development server to the final server of my customer. Now I wanted to make some changes in the form, but when I try to edit the fields or the form, the gear is only spinning and spinning. Also the settings aren't changeable. Try to deactive some system-plugins but that doesn't work. Debug and error reporting didn't helped to locate the error.

Please help.

Kind regards.

The form edit page opens fine ?

if the gear is just spinning then you may need to open the browser console (F12) and check if there are any Javascript errors ?