Hi,
Today, I detected and corrected an ugly mistake, made when I registered AndiCar on Google.
Please try again the secure backup by disabling (if is still enabled) and enabling it again.
After you choose the Google account, an authorization request screen should appear, like in the attached screenshot
Press "Allow" to authorize AndiCar to send emails using your account.
P.S. The secure backup email is sent asynchronously, so it can take a while until you get the notification/email in your inbox.