Why does my key return script not return the key but also not return any errors?

So I wanted to make a key return script for a resort so the checkin system wouldn't copy keys but move them so no duplicates go to players. Anyways thats not important but whats important is that my script doesn't return the key but it also doesn't return any errors so I don't know what to do. I have been trying to fix it for 2 days now but I have no clue what to do.

So a little idea on how it works: The script is placed inside of the tool (for example lets say the tool: Room 201) The thing is if the tool's parent isn't ServerStorage is checks if the player that left had any keys. So the scripts in the keys execute. If the player that left had a key, then that key should return to the server storage.

game.Players.PlayerRemoving:Connect(function(plr)
		local FKey = script.Parent
		if FKey.Parent ~= game.ServerStorage then	
	if plr.Name == script.Parent.Parent.Parent.Name then -- Targets player on game.Players
	local BP = script.Parent.Parent
	if BP then
		local KeyN1 = script.Parent
		if KeyN1 then
		if KeyN1.Parent == BP then KeyN1.Parent = game.ServerStorage -- Assumes the key is in the backpack
			print("Key Returned") 
		elseif KeyN1.Parent  ~= BP then -- if it isn't in the backpack we search in the players character
		local Char = game.Workspace:FindFirstChild(plr.Name)	
			if Char then local Key = Char:FindFirstChild(script.Parent.Name) -- Searches for the specific key
				if Key then Key.Parent = game.ServerStorage
					print("Key returned")
				end
			end
		end
		end
		end
		else return end 
	else return end
end)

The script won't run because when the script is put into a tool that the client has, it wont run on the server, only the client. Here's how to properly put it back into serverstorage:

PUT THIS IN SERVERSCRIPTSERVICE

game.Players.PlayerRemoving:Connect(function(client)
	local tool = client.Backpack["Room 201"] -- or whatever the name of your tool is
	if tool == nil then 
		local char = client.Character
		local allChildren = char:GetChildren()
		for i = 1, #allChildren do 
			if allChildren[i].IsA("Tool") then 
				if allChildren[i].Name == "Room 201" then 
					allChildren[i].Parent = game.ServerStorage
				elseif allChildren[i].Name == "yeyt" then -- or whatever other weapons you have 
					allChildren[i].Parent = game.ServerStorage
				end
			end
		end
	end
	tool.Parent = game.ServerStorage
end)

Props to @Prestory for helping me with this answer