Failed to pass "security validations"?

So my brother and I use my mom's credit card (with her permission) to get zp. He used it the other day to get 10,000, and then I tried, and it said "Failed to exceed the limit". So I waited until today, and now every time I try to get zp it says "Failed to pass security validations". THE SAME CARD WAS USED THE DAY BEFORE, SO IT SHOULD WORK FINE!! Anyone know what to do?

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