Google Domains with App Engine not working

I Bought a new domain through Google Domains and tried to connect it to my AppEngine project. But all I see is a warning symbol that says DNS records could not be found. Certificate activation will retry automatically. when on the SSL security step. I have followed the instructions at https://support.google.com/domains/answer/6009957?hl=en and it does not work. I have also tried to follow Google App Engine SSL error "DNS records could not be found" even though custom domain is working with no results. I need to be able to use this domain in AppEngine.