if you're not too familiar with bitcoin and don't care too much to get technical about it, listen to Andreas Antonopoulos on jre https://www.youtube.com/watch?v=1sOxtBiBpE4
I'm experiencing the same thing. by the center div, I think he means the big text in the center where "WING" is. When you hover over it, it sort of twitches a little bit.
I would argue that developers should aim for 0 error messages ever. If your software requires an action to be performed before moving on, then redirect them to the action, highlight the point of interest, and give a little alert at the top that tells them what to do. When you have a scary error message, users get scared.
> users saying something doesn't work, only for us to point out something simple that they forgot to do, or the instructions they totally didn't read, and then the error magically goes away
If that's how your software works, you're doing it wrong. It means there was little to no design planning. The error should tell the user/developer what to do to avoid the error thus avoiding an angry email in the first place.