Loading animations into a AnimationNodeBlendTree

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right now im trying to delete the existing "Gun" node in the players tree and replace it with the new gun tree

i keep running into a bunch of weird errors

basically this is what im trying to do

the weird part is that the gun paramaters appear in the players tree paramaters but the player is just stuck in a tpose

ive been losing my mind over this all day i have no idea what to do anymore

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this is the error i get in this situation

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putting this code in a deferred call removes the error but the problem persists

theres also this

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ive managed to remove this error too, still doesnt work tho