Crypt Raider "Mover" is crashing.. don't know why

[DAMNN]

Actually it worked well, but in specific time, this kind of error comes and Unreal crashes when I press start button.

void UTriggerComponent::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction *ThisTickFunction)
{
    Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
    AActor* Actor = GetAcceptableActor();
    if(Actor != nullptr)
    {
        UPrimitiveComponent* Component = Cast<UPrimitiveComponent>(Actor->GetRootComponent());
        if (Component != nullptr)
        {
            Component->SetSimulatePhysics(false);
        }
        Actor->AttachToComponent(this, FAttachmentTransformRules::KeepWorldTransform);
        Mover->SetShouldMove(true);
    }
    else
    {
        Mover->SetShouldMove(false);
    }
}

I found when I disabled Mover->SetShouldMove(true) and (false) in TriggerComponent, it worked without crashing.
I watched those lectures multible times and I can’t find what is wrong with my code. Please help me.

[DanM]

That would mean that your Mover isn’t set. Could you show your blueprint?