Comdirect password?

Hello, my problem is that I've recently switched from an iPhone 11 to an iPhone 12 Pro. Now I can't access my comdirect account. The thing is, I tried it on my old phone, and the password I entered there is definitely correct. But you still won't let me access the app.

I know it says that if it happens again, you should call the customer service

However, I wanted to find out for myself and try to solve the problem on my own (of course with your help