For several days I was receiving the missing active authority error while staking tokens from my wallet using Hive Engine. I was able to get around that by reimporting my account, so I thought that problem was localized to Hive Engine or to PEBCAK.
Thanks for posting about the troubles you were encountering. About an hour ago Hiveblocks came back online. Let's hope it's a long time before this happens again (as in never).