Thanks for posting in this forum, Marcos. The error message you've encountered occurs when the login credentials entered in QuickBooks Online don't match Payoneer's record.
Please know that even if you've already logged into your bank's website on another browser, incorrect account information will prevent you from connecting your bank to QuickBooks.
To resolve this issue, I recommend double-checking your username, password, and any necessary account information entered in QuickBooks. Ensure that these details match the records from your bank to successfully connect them.
The Community space is always available if you have other questions or concerns.