Can't Crouching Execution in Metahuman

Development Programming & Scripting Blueprint
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Hi, Everyone i have question why my character can’t crouch im using metahuman character in third person but when i change it to default mannequin character can crouch di i miss something?

here my blueprint

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image1918×967 108 KB

have error on this part
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image1919×991 177 KB

and then the error code is
Blueprint Runtime Error: “Attempted to assign to None”. Node: Set MovementType Graph: OnRep_E_MovementType Function: On Rep E Movement Type Blueprint: PlayerThirdPersonCharacter