Running Animation Not Working

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1

I want my running animation to play when I hold shift, and when I let go it stops.

The issue is that the running animation looks like glitched while holding shift.

I have tried editing the Animate script in the Character, but I do not know what to edit.

Run AnimationId: rbxassetid://2510198475
LocalScript in StarterGui:

-- Services
local PlayerSerivce = game:GetService("Players")
local TweenService = game:GetService("TweenService")

-- User Related References
local Player = PlayerSerivce.LocalPlayer
local Character = Player.Character
local Humanoid = Character:WaitForChild("Humanoid")
local Mouse = game.Players.LocalPlayer:GetMouse()

-- Animation
local CharacterAnimation
local Running = false

CharacterAnimation = Character.Humanoid:LoadAnimation(game:GetService("ReplicatedStorage"):WaitForChild("Run"))

-- Functions
function ChangeFOV(FOV)
	if not Character then Character = Player.Character or Player.CharacterAdded:Wait() end
	local Camera = game.Workspace.Camera

	local Tween = TweenService:Create(Camera, TweenInfo.new(0.1), {FieldOfView = FOV})
	Tween:Play()
end

local function StartRunning()
	ChangeFOV(80)
	CharacterAnimation:Play()
	CharacterAnimation:AdjustSpeed(1.4)

	game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 14
end

local function StopRunning()
	ChangeFOV(70)
	CharacterAnimation:Stop()
	
	game.Players.LocalPlayer.Character.Humanoid.WalkSpeed = 10
end

-- Main
Mouse.KeyDown:connect(function(Hotkey)
	if Hotkey == "0" then
		StartRunning()
	end
end)

Mouse.KeyUp:connect(function(Hotkey)
	if Hotkey == "0" then
		StopRunning()
	end
end)
2

Probably because the animation weight is lower than the walking AnimationTrack:AdjustWeight (roblox.com)