I am trying to add my bank account to app store connect, but even if I enter all my information correctly or incorrectly, the button remains greyed out.
I tried it with 4 different bank information.
I tried different browsers and different computers.
I created a support ticket, but no response yet.
The problem was in the Bank Code/Branch Code. As a response when I contacted Apple:
00XX X000X XXX
It gave a code like this. It will probably tell you this when you contact the bank and ask for the bank code and branch code.