Could a developer please answer my question?
This started happening all of a sudden.

Yesterday, when I tried to buy five cards at the market, I clicked on the button to buy the remaining cards.
When I tried to buy them for €0.07 each, I got a message saying that I needed to verify this purchase on my mobile phone. I had to verify exactly three authorisations, but no purchases were made, and I ended up with a message saying that I had made too many requests to buy things on the market.

I tried that again today, and the same thing happened, except I made the purchase. However, only three cards were purchased and I received the same message saying that I had made too many requests to buy things and that I was on a cooldown period. I waited a bit and bought the remaining two cards without authorisation this time. However, when I tried to buy more cards for a different badge, the same thing happened again. Too many requests, cool down.

I made no changes in my account nor did I log in from a different device.

Do you guys know how to solve this, please?