After a few successful submissions, StockSubmitter stopped recognizing my Adobe ID, with an error message that says "Facebook Authentication not supported". Has this happened to anyone else? How do I get StockSubmitter to recognize my ID again?

I'm a new user and can't get my adobestock configured at all.  My credentials are correct, I do that stupid click on the roads/signs/storefronts whatever thing... and then it gives me an error message.  I tried using an incognito browser and had the same result.  I tried the "live" chat window both the public and official and there was no response on either after 5 minutes.  I'm not feeling great about this tool if I can't even get my configuration working and the chat is useless.  Any compelling reason I should keep at it?  Or should I try one of the other tools?