I spoke to one of the administrators a couple of days ago, to tell him about the problem of pending tasks, and he didn't answer me... They don't explain what's going on either. I also have pending tasks that I can't do... Hopefully it will be solved soon or that, at least, they explain what the problem is.
Same here, I clicked on the watch videos task I got the error and now I get it when I try to click on awaiting tasks. Hopefully it'll be a quick easy fix and be working soon :)