Frontend Settings Download permissions [Solved]

[hoost]

I have users that upload documents via the frontend for several years alraedy. As intended, so far those documents could be downloaded by public users.
However, recently (might be connected with the upgrade to 4.0.36) this has changed and public users don't have the permission anymore initally.
In the joomla config/jdownloads download for public is enabled, but basically without the intended effect.
Is there any additional general setting to consider? Where can I actually find this value in the database?
This wouldn't be too much a difficulty, if  the specific user wouldn't uploads just via frontend. I couldn't find the same permission settings in frontend as in the backend so that he could simply set the download permission actively via frontend. Is there any way to set this in the frontend and what do I need to consider?
Thanks!

[hoost]

I have found my error: There was no authorisation for the selected categories...... No further help needed on this topic