Please Help (Salvage Cars not working)

So installed salvage cars and it worked and everything all the options appeared and it seemed to be running smooth UNTIL you went to remove the part... i tried to remove a part from a car and it said You dont have enough space in your inventory and even with nothing at all in my inventory it stilled wont... it does it on every car no matter if you got in it or what... does anyone know a fix?
 
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