Can't access the demo server running in Eclipse using HTTPS

[lolodomo]

I am running the server inside Eclipse.
Imagine my PC has IP 192.168.0.50.

In Firefox on the same PC, I can load Main UI using the following URLs:
http://localhost:8080/
http://192.168.0.50:8080/

But these 2 URLs are not working:
https://localhost:8443/
https://192.168.0.50:8443/

What could be wrong ? Is HTTPS not enabled in the demo app ? Is another port defined (other than 8443) ?

Could it be related to my PC running Linux ?

And from my Android phone, neither http://192.168.0.50:8080/ nor https://192.168.0.50:8443/ are working (using Chrome).