Do you have a message in the app asking you to edit your credentials?
You need to edit them in Bankin'. Make sure to enter the same credentials you use to connect to your bank.
How to do so?
Check that you know your credentials by logging into your bank. Once you've check that, please follow those steps:
➡️Click here to connect to Bankin' web interface. There is no English version of the web interface for now 😉
➡️Click on 'Profil' (at the bottom on the left), then on 'Compte' on the top left (please see below)
➡️Click on 'Modifier les identifiants" as you can see above
➡️It will get you on the page below. Enter your bank ID ans password (the same you use to log into your bank. Click on "Synchroniser" to relaunch the connection.
You should be all set 💪