I'm not sure what screen you're talking about. Grab a screenshot next time you see it and someone might be be able to help.
I found it on google. I think there's a lot fo posts on it in this group or another. Definitely on Reddit. It's a very common issue. Still don't know how to fix it though or avoid it.
You can't fix it, it happens when they take down the Heroku server that they were hosting the HITs on. You can mostly avoid it by not trying to accept HITs that are more than a few days old at most.
I sort it according to Latest and still run into them. It's always that Noah guy and it be new hits...