Hello. I’ve been seeing this same behavior for a while now on my 10.15.0.2 self-hosted version of OwnCloud. When I open a file for editing, and then leave that page and come back later not having closed the editor, I get a dialog saying: “An error occurred! An Internal server error occurred.” So, not very helpful, and I cannot open that file for like a bit of time (10-15 minutes), at which point it “fixes” itself and I am able to edit the document again. When I remember to close the document right after I am done with edits, this doesn’t happen. Any ideas what I should check as far as settings or system?