Content sharing is currently an experimental feature within Google Chrome, and therefore has to be enabled manually. This can be done with the following steps:
1. In Chrome, open the following URL: chrome://flags/#enable-usermedia-screen-capture
2. Click Enable for setting "Enable screen capture support in getUserMedia()"
3. Click Relaunch Now in the bottom part of the Chrome window
4. Content sharing is now possible in Chrome when connected with WebRTC to a Pexip VMR conference or as a presentation-only participant: