Hi, @Fkarayne .
Thank you for reaching out. I am sorry you are having issues with adding your bank details.
You may be running into a connection error. Can you please try on a new device or browser or clear your cache/cookies and history data? This will allow for a new connection and should remove that error message you are seeing.
Please let me know if you have any further questions or if that error message does not disappear! I would love to learn more about your business. What type of products do you sell?
Talk soon,