Not sure if you solved this already, but when accessing it from your browser remember your browser defaults to port 80 or 88, its possible you will need to force your browser to use port 443 using
If using an “https://” URL, this shouldn’t be necessary, though. The extensions and mobile apps allow entering the full URL (including scheme) as well. @Davy_Thoelen does it work when you use an https:// URL?