Why isn't this working?

Help and Feedback Scripting Support
#1 
	root = character:WaitForChild("HumanoidRootPart")
	module.MoveTo(script.Parent, root)

local characters = workspace:WaitForChild("Characters"):WaitForChild("CharactersInGame"):GetChildren()
local character = nil
local root = nil

  02:51:14.821  Workspace.BotSphere.Script:80: attempt to index nil with 'WaitForChild'  -  Server - Script:80
  02:51:14.823  Stack Begin  -  Studio
  02:51:14.823  Script 'Workspace.BotSphere.Script', Line 80  -  Studio - Script:80
  02:51:14.824  Stack End  -  Studio
#2

You could try using “PrinaryPart” as its pretty much the HumanoidRootPart

#3

I think I know what’s happening, you need to wait for the character to be loaded but I can’t really tell if you are changing the character variable or not, but this is how you get the character:

Local Script 
local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()

-- code here
Server Script 
local players = game:GetService("Players")

players.PlayerAdded:Connect(function(plr)
    plr.CharacterAdded:Connect(function(char)
        -- code here
    end)
end)