“Can not upload media to twitter” & “Error posting on twitter” errors

I have been a happy user of Revive Old Posts for years. It has worked flawlessly posting to Twitter (article + image). As of May 29, 2020 9:46:50 pm EDT, instead of messages like “Successfully shared [POST TITLE] to @MyTwitterId on twitter” in my Sharing Log, it has been showing one of the following two errors for every shared post.

Can not upload media to twitter. Error: {“errors”:[{“code”:89,”message”:”Invalid or expired token.”}]}

or

Error posting on twitter. Error: {“errors”:[{“code”:89,”message”:”Invalid or expired token.”}]}

Nothing has changed in my setup. I tried using a bit.ly shortener (which I haven’t used before) but still get the errors.

Suggestions on how to fix this would be much appreciated!