I'm getting the same error. I swithed from local host to my static IP, i don't know if this is the cause, can you tell me what to do.  

Connection Failed.: Check CuteChat General License Failed : String was not recognized as a valid DateTime.Retry

server side CuteSoft.Chat.ChatLicenseException:
CuteSoft.Chat.ChatLicenseException: Check CuteChat General License Failed : String was not recognized as a valid DateTime.
at ae.b(EnumChatLicense A_0, String A_1)
at ae.a()
at CuteSoft.Chat.ChatApi.CHSync(ChannelRequest request)
at CuteSoft.Chat.DynamicAssembly.ServiceLayerChatApiDecoratorProxy.CHSync_InterceptedCall(ChannelRequest request)
at CuteSoft.Chat.DynamicAssembly.WebLayerChatApiDecoratorProxy.CHSync_InterceptedCall(ChannelRequest request)
at CuteSoft.Chat.ChatRaneService.CHSync(ChannelRequest request)

 

Please help me .