[SOLVED]Why it doens't jump the playerK? ERROR: Attempt to index field 'Jump'(a boolean value)

I want if locked is true that the player jumps? But it isn't working... It's a serverScript

script.Parent.Parent.DriveSeat.ChildAdded:Connect(function(child)
    if script.Parent.Value == false then
        return
    elseif script.Parent.Value == true then
        if child:IsA("Weld") then
            if child.Part1.Name == "HumanoidRootPart" then
            local player = game.Players:GetPlayerFromCharacter(child.Part1.Parent)
            player.Character.Humanoid.Jump = true
            end
        end
    end
end)

First take a look at the error in the title and the error is at line 9...