Move to Location or Actor node works, but On Request Failed

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Ai character’s custom event calls Move to Location or Actor node(AITask Move to). When Ai actor is placed at map then in Details/Default section it shows button On Request Failed and some GUID number. When I delete move to node and compile and save then button On Request Failed disappear. Also, if I move blueprint logic in another file then I get error/warning in that file. I can’t use simple move to or move to node, because AI has behavior tree and I need Lock AILogic=1. All works, but why UE4 report button On Request Failed?

It is necessary to call Move to Location or Actor node(AITask Move to) from custom event in controller, then call that event from character or other blueprint.

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