If you are on Mac with OS version Catalina or later, and you are not able to screen share, please verify that you have the Screen Recording permissions on.
Go to Apple->System Preferences
Click on Security & Privacy
Click on the Privacy tab in the modal popup
Scroll the list on the left to Screen Recording and click
Confirm Loop Team is checked
Restart your Loop Team app and try again
If you still encounter screen sharing issues, please let us know at firstname.lastname@example.org and we will resolve.