Deck Card can't access File Folders !?

Nextcloud 29.0.0

When I want to attach files to a deck card from within a file folder, it is not able to access the file folder system, as shown in this screenshot.

We have investigated and is this a bug in 29.0 or are we missing something?

here is a ChatGPT analysis of the Code we got:

This was also listed by another user here:

Has anybody been able to resolve this?

Could this be a related topic?

I have the same issue. I created a topic but after seeing this i deleted it mine. I hope there is a fix soon. Same happen in the calendar app, trying to do the same thing and same problem.