Share screen

[Anna204]

Hi all, I need quick help PLEASE. I have a Workshop in less than an hour, but I cannot share the screen. The laptop works with Linux Ubuntu. When I try to share it, it says, that I need to install to things (I have no idea how to do this) or switch to x11 display server. I dont know how to do this either. I  also dont know how to install Zoom new, if that would be a good idea, because with Linux its always so complicated. If you can help I really would apreciate it... Anna