Transaction groups say warned, how do I check the warning though

using 8.1

I have yellow warning icons on some transaction groups.
I don’t see how to read the warnings on them though.

Should be in the ‘Events’ tab at the bottom.

Thanks very much

Says table for the group could not be verified: database connections unavailable with the date for yesterday.

Seems like it is connected now, but the warning is still here. How do I clear the warning?