I also have the same problem. With version V2.2.0 my tablet does not work and my phone does.
One person mentioned they saw a new 6gb RAM requirement for V2.2.0. vs 2gb for the older software. I can't confirm this and do not know if it is true. However, my tablet is an older Samsung Galaxy with 3gb RAM and my phone is a Samsung S20+ with 12gb RAM. The tablet does not work and the phone still does.
If ZWO "broke" the app on my tablet, I would like a way to downgrade back to V2.1.0. I have no desire to buy a new tablet because of a Seestar software update.