In my case, I got the error for most of Saturday. I reset the app and it was fine after that. If it was just a server error, it was a heck of a timing coincidence.
That's overkill, and won't you lose all of your context?
Just Reset the app. Go into Settings for the app (right-click on the app, choose Settings from the More menu), click on the Reset button, and the app cache will be wiped and reloaded from the host.
I have to do this several times a week...