Why isn't my weld working and making my character glitch?

Hello, I am trying to make a script were a claw summons and gets welded onto the players hand. Here is what I tried to do.

event.OnServerEvent:Connect(function(player, damage)
    local claw = script.Claw:Clone()
    claw.Parent = game.Workspace
    local weld = Instance.new("WeldConstraint")
    weld.Part0 = player.Character.RightHand
    weld.Part1 = claw
    weld.Parent = claw
end)

The problem that I am having is that the claw is not visible even though its parented to workspace and its transparency is 0. And another problem that I am having is that the claw makes my character glitch and no longer be able to move.

How do I fix this? Thank you for your time!