Cannot sign up/login via apple id on ios / vroswer – Keep - Smart Bookmark Manager Review

I downloaded the app but it would not let me sign in using my Apple ID and the only other option I see is to login using an email ID and password. Since I have not ever signed up for the app I am in a bind because I cannot access the app as it is stuck on the main keep app screen even though it recognises my Face ID to sign (via apple) and it just does not get past the keep front page.Can you please have? I was excited to try this app but I am unable to find a way to proceed
Review by Anubha Tyagi on Keep - Smart Bookmark Manager.