If you are using a Mac, you might need to adjust certain settings fo enabling screen sharing in Chrome browser

1. Navigate to macOS system preferences: click Apple icon on the top left corner, then select System Preferences in the drop-down menu

2. Click Security and Privacy icon in the menu

3. Select the Privacy tab and then scroll down to the Screen Recording menu

4. The applications' checkboxes might be locked for editing. If so, you need to unlock this option: click the lock button on the bottom left.

5. Enter your username and password and then click Unlock button

6. Now, tick the Google Chrome checkbox

7. Click Quit now button

     8. Start the Chrome session again.