but to keep this apart - that was an eDrive thread. This thread is about the nextcloud client.
There was an issue in 3.28.1 that needed to be “hotfixed” in 3.28.2 - there’s a thread on it in the forum.
But if @Chmod700 already runs on the fixed version… maybe some state got mangled clientside. Short of it: reset nextcloud clients data and resync if your connection is good to the remote.