Camera & screen sharing not working

I’m using Chrome browser, & i hv invited 2 frnds so when i turn on video camera so my camera turned on but other 2 members were not able to turn on their camera, the message is highlighted there, tht you phone does not support this feature, & for screen sharing this same message shows to me also.
Pls guide

Thanks a lot for your feedback! Can you give me an overview which phones and browsers all of you are using?

Yes unfortunately is screen sharing not yet supported by mobile browsers.