FPS gun script stopped working when i added walking anims. someone help?

i was making a fps gun system and when i was gonna make the walking anim i didnt animate it. I used scripting to move it around like a walking anim and it broke by that. Idk if anyone can fix it or even help but here is the code anyway. SCroll tgrough until you find a text that says "THIS IS THE ONLY THING THAT HAS AN ERROR" line 91

 local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local UserInputService = game:GetService("UserInputService")
local RunService = game:GetService("RunService")

local camera = game.Workspace.CurrentCamera

local aimCF = CFrame.new()

local isAiming = false
local currentSwayAMT = -.4
local swayAMT = -.4
local aimSwayAMT = .3
local swayCF = CFrame.new()
local lastCameraCF = CFrame.new()

local framework = {
    inventory = {
        "MP5SD";
        "DEAGLE";
        "SHOTGUN";
    };
    module = nil;
    viewmodel = nil;
    currentSlot = 1;
}

function loadSlot(Item)
    local viewmodelFolder = game.ReplicatedStorage.Viewmodels
    local moduleFolder = game.ReplicatedStorage.Modules

    for i,v in pairs(camera:GetChildren()) do
        if v:IsA("Model") then
            v:Destroy()
        end
    end

    if moduleFolder:FindFirstChild(Item) then
        framework.module = require(moduleFolder:FindFirstChild(Item))

        if viewmodelFolder:FindFirstChild(Item) then
            framework.viewmodel = viewmodelFolder:FindFirstChild(Item):Clone()
            framework.viewmodel.Parent = camera


        end
    end
end

RunService.RenderStepped:Connect(function()
    end)
    local rot = camera.CFrame:ToObjectSpace(lastCameraCF)
    local X,Y,Z = rot:ToOrientation()
    swayCF = swayCF:Lerp(CFrame.Angles(math.sin(X) * currentSwayAMT, math.sin(Y) * currentSwayAMT, 0), .1)
    lastCameraCF = camera.CFrame

    local humanoid = character:WaitForChild("Humanoid")

    if humanoid then
        local bobOffset = CFrame.new(math.abs(math.cos(tick() * 10)) * .2, -humanoid.CameraOffset.Y/3,  -humanoid.CameraOffset.Z/3)

        if humanoid.MoveDirection.Magnitude > 0  then
            if humanoid.WalkSpeed == 16 then
                bobOffset = CFrame.new(math.abs(math.cos(tick() * 10)) * .2, -humanoid.CameraOffset.Y/3,  -humanoid.CameraOffset.Z/3)
            elseif humanoid.WalkSpeed == 30 then
    end
        else
            bobOffset = CFrame.new(0 * .2, -humanoid.CameraOffset.Y/3,  0)
        end
    end) 


        for i, v in pairs(camera:GetChildren()) do
            if v:IsA("Model") then
                v:SetPrimaryPartCFrame(camera.CFrame * swayCF * aimCF * bobOffset)
            end
        end
    end



if isAiming and framework.viewmodel ~= nil and framework.module.canAim then

        local offset = framework.viewmodel.AimPart.CFrame:ToObjectSpace(framework.viewmodel.PrimaryPart.CFrame)
        aimCF = aimCF:Lerp(offset, framework.module.aimSmooth)
        currentSwayAMT = aimSwayAMT
    else
        local offset = CFrame.new()
        aimCF = aimCF:Lerp(offset, .1)
        currentSwayAMT = swayAMT
    end
end) -- THIS IS THE ONLY THING THAT HAS AN ERROR
loadSlot(framework.inventory[1])

UserInputService.InputBegan:Connect(function(input)
    if input.KeyCode == Enum.KeyCode.One then
        if framework.currentSlot ~= 1 then
            loadSlot(framework.inventory[1])
            framework.currentSlot = 1
        end
    end

    if input.KeyCode == Enum.KeyCode.Two then
        if framework.currentSlot ~= 2 then
            loadSlot(framework.inventory[2])
            framework.currentSlot = 2
        end
    end

    if input.KeyCode == Enum.KeyCode.Three then
        if framework.currentSlot ~= 3 then
            loadSlot(framework.inventory[3])
            framework.currentSlot = 3
        end 
    end

    if input.UserInputType == Enum.UserInputType.MouseButton2 then
        isAiming = true
    end
end)

UserInputService.InputEnded:Connect(function(input)
    if input.UserInputType == Enum.UserInputType.MouseButton2 then
        isAiming = false
    end
end)