Dariv
I just received my Seestar S50 yesterday (two weeks earlier than promised!). Had the exact same issue. Turning off cellular data for the app is the key, as mentioned above. Once I did that, everything worked exactly as advertised. They REALLY need to mention that in the manual, which would also benefit from review by a native English speaking proofreader. It needs a lot of work.
Nonetheless, the scope exceeds expectations. Great product. This is going to be fun!