Check with your bank and ask them for your bank account IBAN number. There is a checksum in the IBAN number that may be incorrect if it was not added properly. Once you have that number I would check the linked bank accounts under "wallet" click the bank account in question, look to the right and see if the status reads as "confirmed".
If it reads as unconfirmed, I would remove the old bank account and add it again with the new IBAN number as supplied from your banking institution.
https://www.investopedia.com/terms/i/iban.asp
That is a link to IBAN's and describes in detail how they work and the format they should appear to be in. Make sure it is in IBAN format and no other format such as SWIFT.
