I discovered today that users (including myself) have suddenly lost the ability to overwrite documents from the Document Library web part. It just gives the following error:
Sorry, there was a problem uploading this file. Please try again.
I can upload a new file without issue or alternatively I can click "See All" to go directly to the full document library and overwrite without issue there.
But for some reason, I can no longer overwrite documents from the web part.
Why would this be?