I think it's obvious that reloading doesn't do anything.
I was able to send one document and on the second one I now get the error message.
I have had so many problems with the sign in of this account a couple of weeks ago that cost me hours and hours waiting for someone in the customer support chat to talk to me, it's ridiculous. And that was just because I changed the account's email address!
Now I'm having technical problems again. This is NOT what I expected from Adobe. I have not had so many problems that have cost me that much time with a software provider ever!