An exception has occurred while receiving

Hi

whenever I receive information from a remote openVidu server
websocket url : wss://demos.openvidu.io/openvidu?sessionId=demokiru

log

Web socket closed with reason: An exception has occurred while receiving.
UnityEngine.Debug:Log (object)
Unity3dAzure.WebSockets.UnityWebSocket:OnWebSocketClose (object,Unity3dAzure.WebSockets.WebSocketCloseEventArgs) (at Assets/UnityWebSocket/UnityWebSocket.cs:44)
Unity3dAzure.WebSockets.WebSocketMono:HandleOnClose (object,WebSocketSharp.CloseEventArgs) (at Assets/UnityWebSocket/WebSocket/WebSocketMono.cs:140)
WebSocketSharp.Ext:Emit<WebSocketSharp.CloseEventArgs> (System.EventHandler1<WebSocketSharp.CloseEventArgs>,object,WebSocketSharp.CloseEventArgs) (at Assets/Dependencies/websocket-sharp/websocket-sharp/Ext.cs:1229) WebSocketSharp.WebSocket:close (WebSocketSharp.PayloadData,bool,bool,bool) (at Assets/Dependencies/websocket-sharp/websocket-sharp/WebSocket.cs:1139) WebSocketSharp.WebSocket:fatal (string,uint16) (at Assets/Dependencies/websocket-sharp/websocket-sharp/WebSocket.cs:1450) WebSocketSharp.WebSocket:fatal (string,System.Exception) (at Assets/Dependencies/websocket-sharp/websocket-sharp/WebSocket.cs:1444) WebSocketSharp.WebSocket/<>c__DisplayClass178_0:<startReceiving>b__2 (System.Exception) (at Assets/Dependencies/websocket-sharp/websocket-sharp/WebSocket.cs:2192) WebSocketSharp.Ext/<>c__DisplayClass53_0:<ReadBytesAsync>b__0 (System.IAsyncResult) (at Assets/Dependencies/websocket-sharp/websocket-sharp/Ext.cs:750) System.Threading.Tasks.TaskToApm:Begin (System.Threading.Tasks.Task,System.AsyncCallback,object) Mono.Net.Security.MobileAuthenticatedStream:BeginRead (byte[],int,int,System.AsyncCallback,object) System.Net.Security.SslStream:BeginRead (byte[],int,int,System.AsyncCallback,object) WebSocketSharp.Ext/<>c__DisplayClass53_0:<ReadBytesAsync>b__0 (System.IAsyncResult) (at Assets/Dependencies/websocket-sharp/websocket-sharp/Ext.cs:729) System.Threading.Tasks.TaskToApm:Begin (System.Threading.Tasks.Task,System.AsyncCallback,object) Mono.Net.Security.MobileAuthenticatedStream:BeginRead (byte[],int,int,System.AsyncCallback,object) System.Net.Security.SslStream:BeginRead (byte[],int,int,System.AsyncCallback,object) WebSocketSharp.Ext/<>c__DisplayClass53_0:<ReadBytesAsync>b__0 (System.IAsyncResult) (at Assets/Dependencies/websocket-sharp/websocket-sharp/Ext.cs:729) System.Threading.Tasks.TaskToApm:Begin (System.Threading.Tasks.Task,System.AsyncCallback,object) Mono.Net.Security.MobileAuthenticatedStream:BeginRead (byte[],int,int,System.AsyncCallback,object) System.Net.Security.SslStream:BeginRead (byte[],int,int,System.AsyncCallback,object) WebSocketSharp.Ext/<>c__DisplayClass53_0:<ReadBytesAsync>b__0 (System.IAsyncResult) (at Assets/Dependencies/websocket-sharp/websocket-sharp/Ext.cs:729) System.Threading.Tasks.TaskToApm:Begin (System.Threading.Tasks.Task,System.AsyncCallback,object) Mono.Net.Security.MobileAuthenticatedStream:BeginRead (byte[],int,int,System.AsyncCallback,object) System.Net.Security.SslStream:BeginRead (byte[],int,int,System.AsyncCallback,object) WebSocketSharp.Ext/<>c__DisplayClass53_0:<ReadBytesAsync>b__0 (System.IAsyncResult) (at Assets/Dependencies/websocket-sharp/websocket-sharp/Ext.cs:729) System.Threading.Tasks.TaskToApm:Begin (System.Threading.Tasks.Task,System.AsyncCallback,object) Mono.Net.Security.MobileAuthenticatedStream:BeginRead (byte[],int,int,System.AsyncCallback,object) System.Net.Security.SslStream:BeginRead (byte[],int,int,System.AsyncCallback,object) WebSocketSharp.Ext/<>c__DisplayClass53_0:<ReadBytesAsync>b__0 (System.IAsyncResult) (at Assets/Dependencies/websocket-sharp/websocket-sharp/Ext.cs:729) System.Runtime.CompilerServices.AsyncTaskMethodBuilder1:SetResult (int)
Mono.Net.Security.MobileAuthenticatedStream/d__58:MoveNext ()
System.Runtime.CompilerServices.AsyncTaskMethodBuilder1<Mono.Net.Security.AsyncProtocolResult>:SetResult (Mono.Net.Security.AsyncProtocolResult) Mono.Net.Security.AsyncProtocolRequest/<StartOperation>d__23:MoveNext () System.Runtime.CompilerServices.AsyncTaskMethodBuilder:SetResult () Mono.Net.Security.AsyncProtocolRequest/<ProcessOperation>d__24:MoveNext () System.Runtime.CompilerServices.AsyncTaskMethodBuilder1<System.Nullable1<int>>:SetResult (System.Nullable1)
Mono.Net.Security.AsyncProtocolRequest/d__25:MoveNext ()
System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1:SetResult (int)
Mono.Net.Security.MobileAuthenticatedStream/d__66:MoveNext ()
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback ()