script telling the localplayer will not speed up how to solve it?

nvm i figured it out so stupid i was meant to place it in a local script in starter gui cause it will get cloned into the player omg i feel so stupid so stup[id so stupid OGMGGG

You can't get the Local Player from inside of a server script, use a Local Script inside StarterPack instead. Then you can get the player doing

local player = game.Players.LocalPlayer -- No need for any waits because this script wont load until the player is loaded.

Now if you want to get the character, you should use a wait since the character takes time to load. I'm going to add onto the code above

local player = game.Players.LocalPlayer -- No need for any waits because this script wont load until the player is loaded.
local char = player.CharacterAdded:wait() -- Waits for the player's character to load.

char.Humanoid.WalkSpeed = 1 -- And there's your solution.

If this helped, you know what to do :D