Chat window does not appear on the website. Exact steps how to make it work.
- Login into your WordPress website dashboard
Remove the copyright notice Powered by
6) Reload your webpage (Ctrl+F5) to see the changes
Step-by-step guidance how to change User Name and Operator Name for chatbox in Live Chat.
- Save/Update.
Integration methods for better work of Live Chat. 
- Open 'Chat' in your WordPress website Dashboard;
Hints how to solve "Error connecting to server".
1) check if you use any security plugin on your WordPress website. If yes, switch it off and try to use the Chat;