If an individual Bridge run log entry exceeds 4mb of data, you'll see the error message “Run logs aren’t loading right now…” with a suggestion to check your internet connection.
The error prompt is incorrect, and unhelpful.
Just upvoted this since I've encountered it too many times now.
Its sporadic and occurs at the most crucial moment when you are trying to debug something. The surprising thing is that the same set of workflows sometimes produce excessive logs and (most of the other times) they are ok.