This is a good one. I started a chat because IFTTT stopped working. On the advice in the Monzo Chat, I deleted my Monzo app and reinstalled it but it doesn’t work because it won’t recognise my phone.
I am currently running an iphone under IOS 12.1.4. I can’t tell you the App version as I can’t open it but it must the be the latest as it has just come off the App Store.
It looks like you’ve selected the option to sign-up as a new customer instead of logging in to your existing account. Also you might want to remove the personal data in those screenshots!
i allso agree, after you enter email if its the same as on your account,
next it will send magic link to your email for you to click
and thats how you sign in
Another person here jumping in to say you’re signing up not logging in You’re therefore getting that error because your number is already associated with an account.
As the other comments state it seems you’ve entered the wrong email when logging into monzo and thus it thinks you’re setting up a new account. Make sure you’re entering the correct email upon login.