I think something went wrong. You didn't need to open a channel. The Alby hub just connects to your node. It seems you may have been setting up a second, stand alone node.
Discussion
I've no idea. They try so hard to "make it easy" that they don't give any help.
I do have my Hub running, with several peers connected to it and I can see the channel open. And my extension wallet and Alby Go wallets are connect to it too and I can see the shared balance in both.
Forgot to say - I just followed the 5 steps in the set up. One of them was "open your first channel". I clicked on it, and it did that.