Sophia here from Shopify. Welcome to the Shopify Community!
I'm sorry to hear that you've been receiving this error message when trying to link your bank account to Shopify Payments. Are you able to try connecting your bank account from another device to see if the error message persists?
If you've already tried connecting your bank account from more than one device, please contact our team via live chat, email, or callback through the Shopify Help Center so we can take a closer look at the account with you.