Disconnected from client after playing on anniversary realm

Played retail all day, downloaded classic, opened anniversary realm, made a mage and leveled to 3, closed to switch to retail, and now my client has been stuck on connecting for an hour. I tried reinstalling bnet and restarting my internet… neither did anything. What the heck happened?
Error code: BLZBNTBGS80000011

Did you try rebooting your computer entirely? That usually clears up any technical snags.

If the above didn’t work, you’ll want to edit your post and move it to the Technical Support forum for more curated assistance. It’s quite possible nothing is wrong on either your end or Blizzard’s, and rather somewhere along the route you take to connect to their servers. The owner of that locale might have their issue fixed in short order.

There’s also the support article to check out in the meantime:

Ye I did that, forgot to mention.

Will do!

I was in the middle of editing some more in while you were moving it, just wanted to bring your attention to it. It could very well be worth your while just to wait and see what happens in an hour or so.