@jstepien it's goddamn frustrating isn't it, not too mention insulting.
I see the Co-operative Bank here in the UK have made zero progress on this since I stumbled on it ~10 years ago. 🙄
To save you the trouble, I just got two steps into the "open new account" process before this happened: "The name entered is invalid."
https://www.co-operativebank.co.uk/products/bank-accounts/current-account/