There have been recent additional compliance restrictions placed on using the "Sign in with Google" option that restrict the usage of that feature to services that meet certain data and privacy policy criteria.
Unfortunately typing.com does not meet these requirement and I am unable to allow the sign in feature at this time. If you are voluntarily choosing to use the service and agree with their posted privacy policy it is probably still possible to use the service, you would just need to create an account with them that is based on a username and password and not use the Google sign in option.
Sorry, but hope that helps!