Ability not hitting player

[Violet_sheer (TheOtherSider)]

1. What do you want to achieve?
   A working ability that makes an impact on the ground.

2. What is the issue?
   The issue is that when I try to test my ability in a local server, I can’t hit another player sometimes but not all the time.

3. What solutions have you tried so far?
   I’ve tried readjusting the scope of my script, organizing it, and returning but everything i’ve tried hasn’t felt right. I don’t know the source of this issue because it’s somewhat spontaneous and random.

Video:

Server script:

local RS = game:GetService("ReplicatedStorage")
local SS = game:GetService("ServerStorage")
local Players = game:GetService("Players")
local StompAnim = SS.Animations.Stomp
local impact = RS.ImpactModel

local debouncetable = {}--USE THE DEBOUNCETABLE TECHNIQUE
local dummytable = {}
local hittable = {}

local function spawnimpact(rightleg, humanoid, char, plr)
	local newplr
	local function touchhitbox(hit) --Damaging
		newplr = Players:GetPlayerFromCharacter(hit.Parent)
		if newplr and not hittable[newplr] and newplr.Character ~= plr.Character then
			print(hit.Parent)
			hittable[newplr] = newplr
			hit.Parent.Humanoid:TakeDamage(25)
		elseif not newplr and not dummytable[hit.Parent] then
			dummytable[hit.Parent] = hit.Parent
			hit.Parent.Humanoid:TakeDamage(25)
			dummytable[hit.Parent] = nil
		end
	end
	
	local animtrack = humanoid:LoadAnimation(StompAnim)
	
	local newimpact = impact:Clone()
	
	local pos = newimpact.PrimaryPart
	local raycast = workspace:Raycast(rightleg.Position,rightleg.CFrame.UpVector * -10) --Raycast material
	if humanoid:GetState() == Enum.HumanoidStateType.Running or humanoid:GetState() == Enum.HumanoidStateType.Landed then --Check if not jumping or freefall
		if plr and not debouncetable[plr] then --Check if player is not already in cooldown
			debouncetable[plr] = plr --put in cooldown
			animtrack:Play() -- play anim
			newimpact.Hitbox.Quake:Play() -- play sound
			animtrack.Stopped:Connect(function()
				if raycast then
					for i,v in pairs(newimpact:GetChildren()) do
						v.BrickColor = raycast.Instance.BrickColor
						v.Material = raycast.Material
					end
					newimpact.Area.SmokeEffect:Emit(30) --Emit smoke
					newimpact.Parent = workspace
					newimpact:MoveTo(Vector3.new(rightleg.Position.X,rightleg.Position.Y/2.5,rightleg.Position.Z))
					newimpact.Hitbox.Touched:Connect(touchhitbox)
					for i = 0,1,.01 do
						pos.CFrame = pos.CFrame:Lerp(pos.CFrame:ToWorldSpace(CFrame.new(0,-3/100,0)),i)
						task.wait(.001)
					end
					hittable[newplr] = nil
					newimpact:Destroy()
					debouncetable[plr] = nil
				end
			end)
		end
	end
end

RS.Impact.OnServerEvent:Connect(function(plr)
	local char = plr.Character or plr.CharacterAdded:Wait()
	local humanoid = char.Humanoid
	local HRP = char.HumanoidRootPart
	local rightleg = char["Right Leg"]
	spawnimpact(rightleg, humanoid, char, plr)
end)

Update:
I tried debugging both possibilites of the touchhitbox function but nothing happens in the output.
Update 2:
When I tested on a local server, the server sometimes showed the newplr value for nil.
Update 3:
I’m getting the error table index is nil on line 53.(Commented at bottom)

local RS = game:GetService("ReplicatedStorage")
local SS = game:GetService("ServerStorage")
local Players = game:GetService("Players")
local StompAnim = SS.Animations.Stomp
local impact = RS.ImpactModel

local debouncetable = {}--USE THE DEBOUNCETABLE TECHNIQUE
local dummytable = {}
local hittable = {}

local function spawnimpact(rightleg, humanoid, char, plr)
	local newplr
	local function touchhitbox(hit) --Damaging
		newplr = Players:GetPlayerFromCharacter(hit.Parent)
		print(newplr)
		if newplr and not hittable[newplr] and not hit.Parent.Humanoid:IsDescendantOf(plr.Character) then
			hittable[newplr] = newplr
			hit.Parent.Humanoid:TakeDamage(25)
		elseif newplr == nil and not dummytable[hit.Parent] and hit.Parent.Name == "Rig" then
			dummytable[hit.Parent] = hit.Parent
			hit.Parent.Humanoid:TakeDamage(25)
			dummytable[hit.Parent] = nil
		end
	end
	
	local animtrack = humanoid:LoadAnimation(StompAnim)
	
	local newimpact = impact:Clone()
	
	local pos = newimpact.PrimaryPart
	local raycast = workspace:Raycast(rightleg.Position,rightleg.CFrame.UpVector * -10) --Raycast material
	if humanoid:GetState() == Enum.HumanoidStateType.Running or humanoid:GetState() == Enum.HumanoidStateType.Landed then --Check if not jumping or freefall
		if plr and not debouncetable[plr] then --Check if player is not already in cooldown
			debouncetable[plr] = plr --put in cooldown
			animtrack:Play() -- play anim
			newimpact.Hitbox.Quake:Play() -- play sound
			animtrack.Stopped:Connect(function()
				if raycast then
					for i,v in pairs(newimpact:GetChildren()) do
						v.BrickColor = raycast.Instance.BrickColor
						v.Material = raycast.Material
					end
					newimpact.Area.SmokeEffect:Emit(30) --Emit smoke
					newimpact.Parent = workspace
					newimpact:MoveTo(Vector3.new(rightleg.Position.X,rightleg.Position.Y/2.5,rightleg.Position.Z))
					newimpact.Hitbox.Touched:Connect(touchhitbox)
					for i = 0,1,.01 do
						pos.CFrame = pos.CFrame:Lerp(pos.CFrame:ToWorldSpace(CFrame.new(0,-3/100,0)),i)
						task.wait(.001)
					end
					newimpact:Destroy()
					debouncetable[plr] = nil
					hittable[newplr] = nil -- LINE 53!!
				end
			end)
		end
	end
end

RS.Impact.OnServerEvent:Connect(function(plr)
	local char = plr.Character or plr.CharacterAdded:Wait()
	local humanoid = char.Humanoid
	local HRP = char.HumanoidRootPart
	local rightleg = char["Right Leg"]
	spawnimpact(rightleg, humanoid, char, plr)
end)

[Violet_sheer (TheOtherSider)]

Fixed btw, I realized task.wait() doesn’t pause the skill for everyone.