Here is the list you have to control before making session from English Ninjas website:
1) Make sure that your browser is Google Chrome
English Ninjas uses WebRTC technology for video streaming. WebRTC performs best in Google Chrome browsers.
Download Google Chrome: https://goo.gl/AmTw4W
2) Be sure your browser up to date
-Push three points (most right and up button) in your browser
-Click "About Google Chrome" button under "Help" section.
-Control your Google Chrome version. If it is not up to date then update it to the latest version.
3) Be sure that "Cookie Data" option is open:
-Click three points (most right and up button) in your browser
-Click "Content Settings" under Advanced Settings
- Click " Cookies" section
-Be sure that your options look like below:
3) Be sure that your firewall hasn't been blocking English Ninjas
4) Do not try to make a session via "Incognito Window"
5) Be sure that you enable mike and camera authorization to English Ninjas
How to enable mike and camera authorization: https://goo.gl/HQVLwa