Stickmasterluke's ROBLOX U tutorial not working?

I've been trying to script a murder game, and im learning how to do so from a youtube series called ROBLOX U: Mad Bloxxer Lessons. I'm testing the game rn and there is this one mistake that says this:

10:51:55.289 - Players.BARBARIAN59.PlayerGui.ScreenGui.LocalScript:78: '=' expected near '=='

then i thought, well, on the tutorial, stickmasterluke placed in 2 "=" to make it is equal to. But when I take out one of the equal signs, it leads to another mistake that says something about a identifier. Here is what I have around that line:

event.OnClientEvent:connect{funtion(...)}
    local tuple = {...}
    if tuple[1] == "Result" then
        if tuple[2] == "KnifemanWin" then
            resultname.Text = "KNIFEMAN WINS!"
            resultname.TextColor3 = Color3.new(255, 0, 0)
            resultdesc.Text = "The Knifeman killed everyone before the officer stopped him."
        else
            resultname.Text = "INNOCENT WINS!"
            resultname.TextColor3 = Color3.new(0, 255, 0)
            resultdesc.Text = "The Innocent helped the Officer to kill the Knifeman!"
        end
        resultprompt.Visible = true
        resultprompt.Position = UDim2.new(0, -400, .5, -92)
        resultprompt:TweenPosition(UDim2.new(.5, -170, .5, -192), "Out", "Quad", 1)
        wait(5)
        resultprompt:TweenPosition(UDim2.new(1, 60, .5, -92), "Out", "Quad", 1)
    else
        tuple[1] == "Class" then
            if tuple[2] == "Knifeman" then
            classname.Text = "KNIFEMAN"
            classname.TextColor3 = Color3.new(255, 0, 0)
            classdesc.Text = "Kill everyone you see! Watch out for the Officer as the Officer can kill you!"

        elseif tuple[2] == "Officer" then
            classname.Text = "OFFICER"
            classname.TextColor3 = Color3.new(0, 0, 255)
            classdesc.Text = "Try to track down the Knifeman and kill him for good!"
        else
            classname.Text = "INNOCENT"
            classname.TextColor3 = Color3.new(0, 255, 0)
            classdesc.Text = "Try to help the Officer find the Knifeman!"
        end
        classprompt.Visible = true
        classprompt.Position = UDim2.new(0, -400, .5, -92)
        classprompt:TweenPosition(UDim2.new(.5, -170, .5, -192), "Out", "Quad", 1)
        wait(5)
        classprompt:TweenPosition(UDim2.new(1, 60, .5, -92), "Out", "Quad", 1)
    end)

Can anyone find out if this works so there would not be any errors.