new.Frame.Position = UDim2.new(plr:GetMouse().X/plr:GetMouse().ViewSizeX,0,plr:GetMouse().Y/plr:GetMouse().ViewSizeY,0)
This works in play solo but not in a server. Why?
Yeah just copy and past that script into a Local Script and you should be okay!
Copy and paste it into a Local Script, please could you tell us what this script is for so we can assist you more?