If you run into trouble getting your screen share working, please check these two things first:
1. Have you downloaded the screen share extension to your Chrome browser (sorry, screen share does not yet work on Safari)? Please click here and follow the instructions to download the extension if called for: https://www.walkaboutco.com/forum/help-desk/chrome-extension-screen-share
2. Have you recently changed your avatar or office background to a URL photo with a URL link that does not begin with https://? If so, please delete the custom URL and change to a default setting. You can delete the URL for your avatar and you can replace your office URL with one of the standard views.