How can I target a players model instead of the player in players folder?

[rotund depot]

local bindableEvent = game.ServerScriptService:WaitForChild("Stun")
local Players = game:GetService("Players")


local function onPlayerAdded(target)
    target:SetAttribute("StunCounter", 0)
    target:SetAttribute("Stunned",false)
    target:SetAttribute("BaseJump", 50)
    target:SetAttribute("BaseSpeed",16)
end

Players.PlayerAdded:Connect(onPlayerAdded)



local function onMyEventFired(target,length)
    
    -- Your code to run when the event is triggered
    print("InStun")
    local BaseSpeed = target:GetAttribute("BaseSpeed")
    local BaseJump = target:GetAttribute("BaseJump")
    print(BaseSpeed)
    
    target:SetAttribute("StunCounter", target:GetAttribute("StunCounter") + 1)
    target:setAttribute("Stunned", true)
    target.Character.Humanoid.WalkSpeed = 0
    target.Character.Humanoid.JumpPower = 0
    wait(length)
    target:SetAttribute("StunCounter", target:GetAttribute("StunCounter") - 1)
    if target:GetAttribute("StunCounter") == 0 then
        target:setAttribute("Stunned", false)
        target.Character.Humanoid.WalkSpeed = BaseSpeed
        target.Character.Humanoid.JumpPower = BaseJump
    end
    
end

bindableEvent.Event:Connect(onMyEventFired)

Its breaking on the target.Character.Humanoid.WalkSpeed = 0 line

[shadow sage]

** You are now Level 3! **

[rotund depot]

btw this worked properly single player when having the "Stun target" (plr) be my own player instead of another self