I copied the global.asax and global.asax.cs to the root directory and now get a different error (I guess it fixed the previous one)...
ConnectionStringProvider : CuteSoft.Chat.DefaultConnectionStringProvider return null
Line 22: var ImageURL='<%= CuteSoft.Chat.ChatApi.HasReadyOperators()/*HasOnlineOperators()*/?URL_live_help_online_image:URL_live_help_offline_image %>';