Broke again.. no reason

Well, half of my data sources are suddenly saying "invalid credentials" on reports that have been working just fine for months.

Gateways all test successfully.  There is apparently nothing that I can do to fix the issue that shouldn't be happening in the first place.

I'm so glad we don't have anything that anyone is really using in Power Bi, because nobody here likes it at all, and it breaks constantly like this, for no reason, and there is no troubleshooting help available whatsoever.  But I suppose that's pretty much how all of Azure works.. or doesn't..