I have upgraded to Skype Premium to share screens with mulitple people as I am giving a demo but the option goes everytime I have a call with more than one person. It works fine for one person! HELP PLEASE!!!
You should be able to share your screen on a group video call. I can do so here.
Make sure all particpants are on the latest version of Skype which as of today is v188.8.131.52. Don't accept "I have the latest." Get everyone to click on Help > About Skype and make sure they see the latest version reported.