Quobject.EngineIoClientDotNet.Client.EngineIOExceptionTransport not open (Xamarin.Android lib version 0.9.13)

[KirillVolkov]

at Quobject.EngineIoClientDotNet.Client.Transport.Send (Quobject.Collections.Immutable.ImmutableList`1 packets) <0xb3d52d40 + 0x000b8> in :0
at Quobject.EngineIoClientDotNet.Client.Socket.Flush () <0xb3d70bf0 + 0x000d3> in :0
at Quobject.EngineIoClientDotNet.Client.Socket.SendPacket (Quobject.EngineIoClientDotNet.Parser.Packet packet, System.Action fn) <0xb3d52b98 + 0x0013f> in :0
at Quobject.EngineIoClientDotNet.Client.Socket.SendPacket (System.String type) <0xb3b87070 + 0x00037> in :0
at Quobject.EngineIoClientDotNet.Client.Socket.Ping () <0xb3b87030 + 0x0001f> in :0
at Quobject.EngineIoClientDotNet.Client.Socket.b__3 () <0xb3b86f78 + 0x00053> in :0
at Quobject.EngineIoClientDotNet.Thread.EasyTimer+<>c__DisplayClass1.b__0 () <0xb3f964d0 + 0x00057> in :0
at System.Threading.Tasks.AwaitTaskContinuation.InvokeAction (System.Object state) <0xb3d5fb90 + 0x0003f> in :0
at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, Boolean preserveSyncCtx) <0xa1ed2a58 + 0x001f7> in :0
at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, Boolean preserveSyncCtx) <0xa1ed2408 + 0x0002b> in :0
at System.Threading.Tasks.AwaitTaskContinuation.RunCallback (System.Threading.ContextCallback callback, System.Object state, System.Threading.Tasks.Task& currentTask) <0xb3f958c8 + 0x0008b> in :0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0xa1950ef8 + 0x00024> in :0
at System.Threading.Tasks.AwaitTaskContinuation.m__0 (System.Object s) <0xb3e772e0 + 0x0003f> in :0
at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context (System.Object state) <0xa1988fa8 + 0x00053> in :0
at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, Boolean preserveSyncCtx) <0xa1ed2a58 + 0x001f7> in :0
at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, Boolean preserveSyncCtx) <0xa1ed2408 + 0x0002b> in :0
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () <0xa1988f40 + 0x0004f> in :0
at System.Threading.ThreadPoolWorkQueue.Dispatch () <0xa1e1aa30 + 0x001bb> in :0
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () <0xa1e1a558 + 0x00007> in :0