You are receiving the error due to one of the following details missing from the Supplier Bank record:
Sort Code
Account Number
Account Name
Bank IBAN (for Non GBP supplier Bank Accounts)
BACS Reference
Bank Name
The above details are a must in order to process Remittance BACS, and any of the above missing will result in the above error.
If the above still doesn't resolve the issue and if you would like to log a support case, please raise a new case online and reference the title of this article.