Receiving “I/O” error when trying to upload any file as a Guest Contributor

Hello! I’ve been using a SharePoint folder provided by a client to deliver multiple files for a few months now without issue. Today, when attempting to upload any items, I receive an error that says “1 item wasn’t uploaded. I/O error occurred.”

It gives me the option to retry but that doesn’t work. I’ve tried with several file types and sizes, from a video file to a very small caption file, nothing will allow me to upload. I also can’t create folders anymore which I used to be able to do. I checked with the client and they can upload the same files on their end (I sent them via Google Drive). This is all done within the internet browser and I’ve tried both Chrome and Firefox, made sure I’m logged in with the email I usually use and would be given access by the client. What could the issue be?

Happy to provide more info if needed!

submitted by /u/Alive_Pack_5736
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