I got that, but then went onto my phone ID3 app - Profile - [my name] profile.
Then where it says 'password' click 'Edit'.
Scroll down to 'Connected apps' - Volkswagen United Kingdom.
Click on that - first time it asked me to verify a mobile number with a code and told me it shared info with the site.
Once I got through that I tried logging on with my laptop & it worked.