How Do I Fix This WalkSpeed Problem?[Closed]

What I did is completely rewrite the script so it changes EVERYONE's WalkSpeed if you would like it to be just yours you would have to play around with it. Also with your current one you never added a loop or anything like that so it would be used once and never be used again, or possibly even never be used. Also here is some information on Local Scripts you could learn from that source when and when not to use a Local Script

Put this in a NORMAL Script!

playerspeed = 60
gw = game.Workspace

while true do
wait(5)
local list = game.Players:getChildren()
for i = 1, #list do
    local player = gw:findFirstChild(list[i].Name)
    if player ~= nil then
        hum = player:findFirstChild("Humanoid")
        if hum ~= nil then
            hum.WalkSpeed = playerspeed
        end
    end
end
end

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The script is trying to change your characters WalkSpeed before your character loads.

The simplest thing you could do is use the CharacterAdded event

game.Players.PlayerAdded:connect(function(player) --this runs every time a player joins the game
    if player.Name == "tanzane" then --this checks if the player's name is tanzane
        player.CharacterAdded:connect(function(char) --this runs every time your character respawns
            local humanoid = char:WaitForChild("Humanoid") -- this waits for the character's humanoid to load
            humanoid.WalkSpeed = 60 -- this changes the humanoid's walkspeed
        end)
    end
end)