What exactly isn't working? The report manager UI, requesting a report from the web service, what?
Note that report manager UI requires IE to work properly still. It should render in other browsers but some functionality doesn't work.
For HTTPS most browsers only support TLS 1.2+. Ensure that SQL is configured to use TLS 1.2+ otherwise browsers will fail the call.
If you still cannot figure it out then use Fiddler or equivalent to monitor the network call to see where it is failing.