Okay, trying to solve a mystery that crops up only on #QOTO. This time my screen shot includes the time stamp. QOTO was behaving itself until, coincidentally, someone's posted video came up in my Federated feed--then for an extensive time, it was nonstop....til I got off the Federated feed, then it cleared up.
The format of how the error displays seems to be Mastodon-type because after I deleted my account at Universeodon, then verified the delete by attempting to access the account, Universeodon delivered an accessing error in that exact same form.