For several hours now, one of the event categories in Google Calendar has failed to load. I just get this message:

"We could not load details for your calendar. Please try again in a few minutes."

This has happened before, but never for this long. Is anyone else experiencing this problem? Perhaps unsurprisingly, it is the category I called 'important'. :-(All the other categories load fine, and can be set to hidden, and back to unhidden, without problems.

I've now been unable to access this event category (which I called 'important') for over 8 hours... I have no idea what important things I'm supposed to be doing today...! :-(

As I said, the other categories load fine. I've even tried doing a hard refresh of my browser and restarting the computer, but without success.

It's now working, but only after 13 hours(!) of not having access to this event category.