I initially installed OpManager on a linux box using normal http (port 80).

Afterwards, I decided to enable ssl.  Following the instruction I did the following:

ssl_gen.sh -f Enable

At this point, I expected the url https://opmanager.xyz.com/ to immediately work.  Notice this is over 443.  Unfortunately, it didn't work.  

I then point the browser to https://opmanager.xyz.com:80/ and that worked.  Notice I am using port 80 for https traffic.

So, I manually run the following and restart the server 

ChangeWebServerPort.sh 80 443

https://opmanager.xyz.com/ still does work

https://opmanager.xyz.com:80/ is also broken