I get errors while trying to change walk speed with the press of a button. Fix?

I get this error, Workspace.BootShack.Boots.Clickbox.ClickDetector.BuyBoot:17: attempt to index nil with 'Name'

Code is right here.

local player = game.Players.LocalPlayer -- this is the variable im referencing.


script.Parent.MouseClick:Connect(function()

	if _G.points < 3 then

print("Player is missing required money.")

	end

	if _G.points > 2 then

			_G.points = _G.points - 3
			workspace{player.Name}:FindFirstChild("Humanoid").WalkSpeed = 22 --I get the error right here.
			script.Parent.MaxActivationDistance = 0
			script.Parent.Parent.Parent.Boots.Transparency = 1
			script.Parent.Parent.Parent.Boots.CanCollide = false

		end

end)
		

if its a localscript just use localplayer

if _G.points > 2 then
_G.points = _G.points - 3
game.Players.LocalPlayer.Character.Humanoid.WalkSpeed =22
script.Parent.MaxActivationDistance = 0
script.Parent.Parent.Parent.Boots.Transparency = 1
script.Parent.Parent.Parent.Boots.CanCollide = false
end

I'm sorry, but local scripts can't work on the workspace. Local scripts only work if it is a descendant of the local player or the local player's character. Instead, replace the local script with a server script (normal script) with the following code:

script.Parent.MouseClick:Connect(function(playerWhoClicked) --calls a function when clickdetector is clicked
	if _G.points < 3 then return end -- if player doesn't have enough money the script says screw it don't run this function
	if _G.points > 2 then -- everything else after this line is the same as your script.
		_G.points = _G.points - 3
		local playerName = playerWhoClicked.Name
		local chr = game.Workspace:FindFirstChild(""..playerName)
		chr.Humanoid.Walkspeed = 22
		script.Parent.MaxActivationDistance = 0
		script.Parent.Parent.Parent.Boots.Transparency = 1
		script.Parent.Parent.Parent.Boots.CanCollide = false
	end
end)

It should work now however if it doesn't work, let me know. I would use GetCharacterFromPlayer instead of FindFirstChild(""..playername) but sadly GetCharacterFromPlayer is not a thing in roblox scripting yet.