To access your Bitsa account information from the website, it is necessary to confirm access from the Bitsa app through a notification that is received in real-time and has a limited verification time. It is like a second verification (2FA). For this reason, it is necessary that you have enabled the notification permissions of the Bitsa app on your cell phone.
If you do not receive any notification on your phone, it is likely that you have not given permissions to the Bitsa app or that you have put your terminal in do not disturb mode. Check this in your phone's settings.