Re: No "https://www" returns web page blocked
Accoarding to your Screenshots the http Site is blocked by webfilter by FortiGuard(tm) Category .
You didn't write if that is wanted behaviour. If it is not check wether you have a rating override into an allowed cathegory for it or allow the cathegory. Also if you use webfilter check your rules. If it is allowed by url filter but thus blocked by webfilter set the accoarding url filter rule to exempt instead of allow to prevent this.
If wanted behaviour should be to block both http and https check if you have ssl inspection enabled on the corresponding policy and if in ssl inspection profile https is enabled and the cathegory is not in the trusted sites list.