How do you get an enemy NPC to follow the player?

Disclaimer (I'm very new to coding within Roblox and 90% of my game code is from the toolbox, and the battledroid I'm using is also from there; hence my being confused on how to fix it)

The Battledroid NPC won't attack me, but will attack a "drooling zombie". All I need for the Battle Droid to do is to follow me because it already does damage upon touching the player, and it will already shoot and damage the player. - - Could other scripts within my game be affecting it's response? I already deleted the spawn protection wall because I thought it might be messing with it. But it's probably the code which I'll add underneath. Thanks for any help!!

(Btw this is the link to the game: https://www.roblox.com/games/4931576856/Star-Wars-The-Citadel-Challenge)

local larm = script.Parent:FindFirstChild("Left Arm")
local rarm = script.Parent:FindFirstChild("Right Arm")

function findNearestTorso(pos)
    local list = game.Workspace:children()
    local torso = nil
    local dist = 500
    local temp = nil
    local human = nil
    local temp2 = nil
    for x = 1, #list do
        temp2 = list[x]
        if (temp2.className == "Model") and (temp2 ~= script.Parent) then
            temp = temp2:findFirstChild("Right Arm")
            human = temp2:findFirstChild("Humanoid")
            if (temp ~= nil) and (human ~= nil) and (human.Health > 0) then
                if (temp.Position - pos).magnitude < dist then
                    torso = temp
                    dist = (temp.Position - pos).magnitude
                end
            end
        end
    end
    return torso
end

human = script.Parent:findFirstChild("Humanoid")
if human == nil then human = script.Parent:findFirstChild("Zombie") end

while true do
    wait(1)
    local target = findNearestTorso(script.Parent.Torso.Position)
    if target ~= nil then
        human:MoveTo(target.Position, target)
        human.TargetPoint = target.Position
    end

end