Also see here: #1239992330623254698 message
I have contacted my bank and they told me, that there was no request send to them. I retyped everything like 10 times and tried it also after a couple of weeks. The bank told me that they got a '3df-methode'?? which now every bank needs to setup in Germany.
Can someone help me with this situation? My credit card works for the Plus Subscription, but not for the API.