TYPO3 Core

With the new TYPO3 9.5.6 released today, I can't add content elements into a gridelement.
If I want to add an new content element the modal is empty and a JavaScript error occurs:

TypeError: require is not a function

It only works for content elements outside of a gridelement container.

Step to reproduce

- Have a TYPO3 9.5.6 instance with the extension gridelementsteam/gridelements (version 9.2.0) installed and some gridelements defined
- Select a page and add a gridelement
- Create a new content element into the gridelement
- The exception occurs like described above

I've tested it with an TYPO3 9.5.5 with the same configurations and it worked as expected.