MinibitsCash on Nostr: From the screenshot it is visible that there is an error when sending one of the ...

From the screenshot it is visible that there is an error when sending one of the zaps.

If you see related transaxtion with error status in the wallet, dm me audit trail from tx detail screen. If you do not see such transaction, try to send few sats to another lightning address (even to yourself) from inside wallet few times to check if any error appears.