Code won't damage players with no errors in output?

Hey there, unidentifiedw

Are you using any custom characters that don't have humanoids? Is the sword hitbox maybe not big enough? Are you getting an infinite yield from the variables in the top of the script? I went ahead and tested this in my studio with a part and it worked just fine.

Here is the code that I used:

Server:

local ReplicatedStorage = game:GetService("ReplicatedStorage")

local debounce = false
ReplicatedStorage.test.OnServerEvent:Connect(function()
    print(1)
    script.Parent.Touched:Connect(function(Hit)
        if Hit.Parent:FindFirstChild("Humanoid") and not debounce then
            debounce = true
            print(2)
            Hit.Parent.Humanoid:TakeDamage(10)
            wait(0.5)
            debounce = false 
        end
        print(3)
    end)
    print(4)
end)

Client:

local UserInputService = game:GetService("UserInputService")

UserInputService.InputBegan:Connect(function(input, gpe)
    if gpe then return end
    if input.KeyCode == Enum.KeyCode.Q then
        game:GetService("ReplicatedStorage").test:FireServer()
    end
end)

I just used UserInputService for testing purposes so I could fire the remote event when I press a key.

As always, if this helped you out make sure to upvote it, if this solves your issue than make sure to mark this as the answer so I can earn that sweet sweet reputation and other people on the forums don't mistake this thread for an active discussion.

You put the handle as the starter gear handle not the player's actual handle try this

local RS = game:GetService("ReplicatedStorage")
local SwordDamage = RS:WaitForChild("SwordDamage")
local Sword 
local debounce = false


SwordDamage.OnServerEvent:Connect(function(plr) -- needed the plr argument since you fired a remote event
        print(1)
        Sword = plr.Backpack.Sword.Handle
        Sword.Touched:Connect(function(Hit)
        if Hit.Parent:FindFirstChild("Humanoid") and not debounce then
            debounce = true
            print(2)
            Hit.Parent.Humanoid:TakeDamage(10)
            wait(0.5)
            debounce = false 
        end
        print(3)
    end)
    print(4)
end)