Yes, you need to make the UFUNCTION both BlueprintCallable and meta = (BlueprintThreadSafe). You cannot be doing anything inside the function that is not thread safe or you will get that error. You also must call the function only from anywhere it is thread safe. i.e. NativeThreadSafeUpdateAnimation, BlueprintThreadSafeUpdateAnimation, OnUpdate, OnBecomeRelevant State Nodes…
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