The request is not supported - error

I am begging you for help. After huge problems with updating, I finally have a working MSFS.
I had.
I did nothing and now an error window appears:
“The request is not supported”
Before that, there is a window with the query:
“Do you want to allow this app to make changes to your device?”
and
“Microsoft Store Package Dependency Installer”

It is like that every time.
I can only run MSFS now as administrator every time I go through these windows.

Please help …

Moved to #bugs-and-issues:performance to better focus the topic and possible responses.

Nobody has ideas ???
I believe this happened after MSFS_AddonsLinker was started.
Does anyone use this add-on without a problem after SU5 ???

hmmmm… okay.. then I link my answer to here too !