Screen sharing not working (Bad internet connection)

Test your internet connection using Speedtest.net. If your internet connection is okay, try again later. There might be issues with your internet service provider and there is nothing you can do about it. 

Make sure you close other programs that take internet bandwith such as torrents and music streaming services.

Reboot (turn it off and on again) is a common fix for almost 90% of the computer problems you might be having. Reboot your computer now and try again.