Barclays Bank feed not connecting Error 6013 - Sorry we were unable to complete your Open Banking request, please go back to your Third Party Provider.

The bank feed expired for a client, they tried to reconnect the feed the normal way, when they did they ran into the above error message, I tried connecting on a different computer after clearing cache and cookies with the same result. this error occurs after we have logged into the account, on the screen in which you tick the accounts you want to link a bank feed to, but the bank accounts do not show only this message. I have also tried disconnecting the bank accounts and reconnecting them but I am getting the same error. any advice would be appreciated.