Hey, this look like relay connection issue. Try to reconnect the relays in Settings or reset to defaults and add the one you are sure your profile lived in.

Then to test the connection before replacing the wallet profile, you can try to put your nostr pubkey to Public contacts. If it loads your follows, ok if not, you can quickly add another relay and retry.

You'll then find option to replace minibits wallet profile by your own in Privacy - as it is the most private option to receive ecash if you host your profile.

However you can consider option to keep your minibits profile and add minibits.cash wallet address to the lightning address field of your nostr profile in the nostr client you use. That way you can receive both ecash and zaps / sats to it as it works as a lightning address at the same time.