Autofill has stopped working, which it does from time to time.

I'm having the same issue as well. It has existed for weeks now. Based on one observation, it might have something to do with the extension auto-updating. When I last noticed the extension not working, I saw that it was updated. Perhaps it's disabling itself of the update and not re-enabling itself? Or crashing? Just a guess, but this issue is not specific to one user.