I've just downloaded the windows version, running on windows 11.

I think there might be a bug, as I added the following addresses:

1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa (received reward for mining block #0)
12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX (received reward for mining block #1)

None of these addresses show any balance in the app, where as according to both mempool.space and blockchair.com they have a balance larger than zero.

Im connected via VPN, maybe this is an issue?
Since i know each address should have a balance, i tried the "updating balancec" button, but it returned a 430 (unknown status) error.