My mother's UAE visa was rejected as blacklisted despite never traveling before

I am panicking because my mother’s Dubai visa application was just rejected with the reason listed as “Blacklisted” or “Security Ban.” This makes absolutely no sense because this is her first time ever traveling abroad; she has never been to the UAE or anywhere else before, so she cannot have a bad record.

Our flight is scheduled for two weeks from now and the tickets are non-refundable. Has anyone experienced a false blacklisting like this? Is it a system glitch? I need to know the specific steps to appeal this or prove it is a mistake before we miss our trip.