How Do I Make My Combat System Work?

I Trying Making A Combat System And I Can't Seem To Get It To Work Here Is My Code

local LPunchU = script:WaitForChild("LPunchU")
local RPunchU = script:WaitForChild("RPunchU")

local LKickU = script:WaitForChild("LKickU")
local RKickU = script:WaitForChild("RKickU")


local char = script.Parent

local humanoid = char:WaitForChild("Humanoid")


local uis = game:GetService("UserInputService")


local debounce = false
local isAnimationPlaying = false


local loadedAnimation
local currentAnimationId


local remoteEvent = game.ReplicatedStorage.OnSuccessfulHit


uis.InputBegan:Connect(function(input, gameProcessed)

    if gameProcessed or isAnimationPlaying then return end


    if input.KeyCode == Enum.KeyCode.Q then


        isAnimationPlaying = true
        currentAnimationId = LPunchU.AnimationId

        loadedAnimation = humanoid:LoadAnimation(LPunchU)

        loadedAnimation:Play()


    elseif input.KeyCode == Enum.KeyCode.E then


        isAnimationPlaying = true
        currentAnimationId = RPunchU.AnimationId

        loadedAnimation = humanoid:LoadAnimation(RPunchU)

        loadedAnimation:Play()


    elseif input.KeyCode == Enum.KeyCode.F then


        isAnimationPlaying = true
        currentAnimationId = LKickU.AnimationId

        loadedAnimation = humanoid:LoadAnimation(LKickU)

        loadedAnimation:Play()


    elseif input.KeyCode == Enum.KeyCode.G then


        isAnimationPlaying = true
        currentAnimationId = RKickU.AnimationId

        loadedAnimation = humanoid:LoadAnimation(RKickU)

        loadedAnimation:Play()
    end

    if loadedAnimation then 


        loadedAnimation.Stopped:Wait()

        isAnimationPlaying = false
    end
end)


humanoid.Touched:Connect(function(hit, bodyPart)

    if not isAnimationPlaying or debounce then return end

    local charOfHitPlayer = hit.Parent
    local humanoidOfHitPlayer = charOfHitPlayer:FindFirstChild("Humanoid")

    if not humanoidOfHitPlayer then return end

    debounce = true


    if currentAnimationId == LPunchU.AnimationId and bodyPart.Name == "LeftHand" then

        remoteEvent:FireServer(humanoidOfHitPlayer)

    elseif currentAnimationId == RPunchU.AnimationId and bodyPart.Name == "RightHand" then

        remoteEvent:FireServer(humanoidOfHitPlayer)

    elseif currentAnimationId == LKickU.AnimationId and bodyPart.Name == "LeftFoot" then

        remoteEvent:FireServer(humanoidOfHitPlayer)

    elseif currentAnimationId == RKickU.AnimationId and bodyPart.Name == "RightFoot" then

        remoteEvent:FireServer(humanoidOfHitPlayer)
    end

    wait(0.1)

    debounce = false
end)

Also I Am Getting This Error Infinite yield possible on 'Workspace.Proskillez342.Combat Handler:WaitForChild("LKickU")'