appears to connect to websocket, but there's a python error

Source/EventCenterPlugin/Private/EventSourceActor.cpp

@@ -5,7 +5,8 @@
 DEFINE_LOG_CATEGORY(EventSourceLog);
 
 AEventSourceActor::AEventSourceActor() :
-	redis(nullptr)
+	redis(nullptr),
+	WebSocket(nullptr)
 {
 	UE_LOG(EventSourceLog, Log, TEXT("CTOR()"));
 
@@ -17,6 +18,7 @@ AEventSourceActor::AEventSourceActor() :
 	//redis = CreateDefaultSubobject<URedisObject>(TEXT("RedisObject"));
 
 	//RootComponent = redis;
+
 }
 
 AEventSourceActor::~AEventSourceActor()
@@ -134,3 +136,63 @@ void AEventSourceActor::InternalSubscribeCallback(FString Channel, FString Messa
 	}
 }
 
+// ======================================= web sockets =============================================
+
+void AEventSourceActor::OnConnected() 
+{
+	GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Red, "OnConnected");
+	UE_LOG(EventSourceLog, Log, TEXT("OnConnected"));
+
+	WebSocket->SendMessage(TEXT("Hello Server!"));
+}
+
+void AEventSourceActor::OnConnectionError(const FString& Error)
+{
+	GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Red, "OnConnectionError");
+	UE_LOG(EventSourceLog, Log, TEXT("OnConnectionError"));
+
+	// Connection failed.
+	UE_LOG(EventSourceLog, Error, TEXT("Failed to connect: %s."), *Error);
+}
+
+void AEventSourceActor::OnClosed(int64 StatusCode, const FString& Reason, bool bWasClean)
+{
+	GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Red, "OnClosed");
+	UE_LOG(EventSourceLog, Log, TEXT("OnClosed"));
+
+	UE_LOG(EventSourceLog, Warning, TEXT("Connection closed: %d:%s. Clean: %d"), StatusCode, *Reason, bWasClean);
+}
+
+void AEventSourceActor::OnMessage(const FString& Message)
+{
+	GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Red, "OnMessage");
+	UE_LOG(EventSourceLog, Log, TEXT("OnMessage"));
+
+	UE_LOG(EventSourceLog, Log, TEXT("New message: %s"), *Message);
+}
+
+void AEventSourceActor::OnRawMessage(const TArray<uint8>& Data, int32 BytesRemaining)
+{
+	GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Red, "OnRawMessage");
+	UE_LOG(EventSourceLog, Log, TEXT("OnRawMessage"));
+
+	UE_LOG(EventSourceLog, Log, TEXT("New binary message: %d bytes and %d bytes remaining."), Data.Num(), BytesRemaining);
+}
+
+void AEventSourceActor::OnMessageSent(const FString& Message)
+{
+	GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Red, "OnMessageSent");
+	UE_LOG(EventSourceLog, Log, TEXT("OnMessageSent"));
+
+	UE_LOG(EventSourceLog, Log, TEXT("We just sent %s to the server."), *Message);
+}
+
+void AEventSourceActor::SetupWebSockets()
+{
+	if (WebSocket == nullptr) {
+		WebSocket = UBlueprintWebSocket::CreateWebSocket();
+	}
+
+	WebSocket->Connect(TEXT("ws://localhost:8765/"), TEXT("ws"));
+}
+

Source/EventCenterPlugin/Public/EventSourceActor.h

@@ -8,6 +8,7 @@
 #include "RedisObject.h"
 
 // BlueprintWebSocketPlugin
+// Docs: https://github.com/Pandoa/BlueprintWebSocket
 #include "BlueprintWebSocketWrapper.h"
 
 // EventCenterPlugin
@@ -66,15 +67,30 @@ public:
 	UPROPERTY(BlueprintAssignable)
 		FMySubscriberDelegate MyDelegate;
 
+	/** Set up websockets.*/
+	UFUNCTION(BlueprintCallable, Category = "EventCenter")
+	void SetupWebSockets();
+
 protected:
 	// Called when the game starts or when spawned
 	virtual void BeginPlay() override;
 
 	virtual void BeginDestroy() override;
 
+	// websocket callbacks
+	UFUNCTION() void OnConnected();
+	UFUNCTION() void OnConnectionError(const FString& Error);
+	UFUNCTION() void OnClosed(int64 StatusCode, const FString& Reason, bool bWasClean);
+	UFUNCTION() void OnMessage(const FString& Message);
+	UFUNCTION() void OnRawMessage(const TArray<uint8>& Data, int32 BytesRemaining);
+	UFUNCTION() void OnMessageSent(const FString& Message);
+
 private:
 	URedisObject* redis;
 	
+	UPROPERTY()
+	UBlueprintWebSocket* WebSocket;
+
 	// Handle callbacks.
 	// NB(bt): Declared 'UFUNCTION()' so reflection enables as a delegate callback.
 	UFUNCTION()