Error AnimationClipProvider service failed to load. Anyone know why?

This the code with animations, it is for a driveby script put inside the tool

-- Animations --
local l_frontaim_anim = 'rbxassetid://10967653013' -- stance = 2
local l_rightaim_anim = 'rbxassetid://10967653851' -- stance = 3
local l_leftaim_anim = 'rbxassetid://10967654620' -- stance = 4
local l_topaim_anim = 'rbxassetid://10967655398' -- stance = 5
local l_frontaim_animation = Instance.new('Animation')
l_frontaim_animation.AnimationId = l_frontaim_anim
left_frontaim = plrhum:LoadAnimation(l_frontaim_animation)

local l_rightaim_animation = Instance.new('Animation')
l_rightaim_animation.AnimationId = l_rightaim_anim
left_rightaim = plrhum:LoadAnimation(l_rightaim_animation)

local l_topaim_animation = Instance.new('Animation')
l_topaim_animation.AnimationId = l_topaim_anim
left_topaim = plrhum:LoadAnimation(l_topaim_animation)

local l_leftaim_animation = Instance.new('Animation')
l_leftaim_animation.AnimationId = l_leftaim_anim
left_leftaim = plrhum:LoadAnimation(l_leftaim_animation)

plrhum.Changed:connect(function(prop)
	if plrhum.Jump then
		stance = 1
		drivebyposed = false
		left_frontaim:Stop(speed)
		left_rightaim:Stop(speed)
		left_leftaim:Stop(speed)
		left_topaim:Stop(speed)
	end
end)

sp.Equipped:connect(function()
	equipped = true
end)

sp.Unequipped:connect(function()
	equipped = false
	seat = plrhum.SeatPart	
	if plrhum.Sit == true then
		script.Conversion:FireServer('UnPos', seat) 
	end
	left_frontaim:Stop(speed)
	left_rightaim:Stop(speed)
	left_leftaim:Stop(speed)
	left_topaim:Stop(speed)
end)

uis.InputBegan:connect(function(input, GameProcessedEvent)
	if equipped and input.KeyCode == Enum.KeyCode.Z and not GameProcessedEvent and plrhum.Sit then
		stance = stance + 1
		seat = plrhum.SeatPart		
		script.Conversion:FireServer('Pos', seat)
		if stance == 1 then
			drivebyposed = false
			--print('sitting')
			seat = plrhum.SeatPart	
			script.Conversion:FireServer('UnPos', seat) 
			left_frontaim:Stop(speed)
			left_rightaim:Stop(speed)
			left_leftaim:Stop(speed)
			left_topaim:Stop(speed)
		elseif stance == 2 then
			drivebyposed = true
			--print('frontaim')
			left_frontaim:Play(speed)
			left_rightaim:Stop(speed)
			left_leftaim:Stop(speed)
			left_topaim:Stop(speed)
		elseif stance == 3 then
			drivebyposed = true
			--print('rightaim')
			left_frontaim:Stop(speed)
			left_rightaim:Play(speed)
			left_leftaim:Stop(speed)
			left_topaim:Stop(speed)
		elseif stance == 4 then
			drivebyposed = true
			--print('leftaim')
			left_frontaim:Stop(speed)
			left_rightaim:Stop(speed)
			left_leftaim:Play(speed)
			left_topaim:Stop(speed)
		elseif stance == 5 then
			drivebyposed = true
			--print('topaim')
			left_frontaim:Stop(speed)
			left_rightaim:Stop(speed)
			left_leftaim:Stop(speed)
			left_topaim:Play(speed)
			stance = 0
		end
	end
end)

And this is the server script

script.Parent.OnServerEvent:Connect(function(player, Request, obj)
	if Request == "Pos" then
		if obj.Name == "FR" or obj.Name == "RR" then
			obj:FindFirstChild('SeatWeld').C0 = CFrame.new(2.3,1.5,-0.6)*CFrame.fromEulerAnglesXYZ(-(math.pi/2),0,0)	
		elseif obj.Name == "FL" or obj.Name == "RL" then
			obj:FindFirstChild('SeatWeld').C0 = CFrame.new(-2.3,1.5,-0.6)*CFrame.fromEulerAnglesXYZ(-(math.pi/2),0,110)	
		end
	elseif Request == "UnPos" then
		obj:FindFirstChild('SeatWeld').C0 = CFrame.new(0, 0, 0)*CFrame.fromEulerAnglesXYZ(-(math.pi/2),0,0)
	end
end)

Can anyone help? I am really confused and this has been going on for days.