Issue streaming to Vimeo from ATEM Mini Pro

Has anyone else suddenly been unable to stream to Vimeo from the ATEM lately? No issues for the past year, but suddenly in the last month we are unable to get On Air to connect. Our setup is ATEM Mini Pro connected via ethernet, using default Vimeo output settings. Has worked flawlessly since we started using Vimeo a year ago. Now when ON AIR is selected, we get the blinking ON AIR and it never connects. Went back and tried streaming directly to Facebook, same process, and no issues at all.
One fix I thought had worked, some past issues were advised to edit XML file to create the Vimeo settings. RTMPS url seemed to be the same... Changed script to use the RTMP server, seemed to work. Changed back to RTMPS server url, and got solid red connection for ON AIR. Thought that fixed it, BUT the cache filled and maxed after 10-15 minutes...
One fix I thought had worked, some past issues were advised to edit XML file to create the Vimeo settings. RTMPS url seemed to be the same... Changed script to use the RTMP server, seemed to work. Changed back to RTMPS server url, and got solid red connection for ON AIR. Thought that fixed it, BUT the cache filled and maxed after 10-15 minutes...