Problems upon problems

It had already been an issue recently that the Windows desktop app - meaning the local folder - no longer showed any files, even though they were still visible on the Drime website. However, when I added new files to that folder, they were uploaded, even if they disappeared again shortly afterward from the Windows folder view. But now, uploads don’t work at all anymore - not even through the website. It looked as if they were uploading normally, but the new files no longer appear on the Drime website either.

Logging out everywhere and logging back in again, as well as reinstalling the app, hasn’t fixed anything.

And I’m talking about just a few megabytes of data in the form of PDFs.

What is going on here?