Tips to debug a board that doesn't load?

Hi,

Lately I'm running quite frequently into boards that don't load, they look something like this:

https://i.imgur.com/XpnwmFi.png

When this happens, I typically log into the database and poll the "Activities" collection to see what was the last change in that board. Up to now, it normally was some kind of corrupt operation which I could undo manually.

Also, I can see an error in the browser javascript console, but I can't relate it to anything meaningful. Today, I'm getting a bunch of errors, but there is one read "uncaught typeError" which I copy below:

https://i.imgur.com/ZIRy6Eq.png

Of course, any help to debug this issue is appreciated, but what I'm really interested in knowing is a general procedure to debug these kind of errors, that would be great!

Thanks! Pedro