how come this value always outputs the error nil even though it has a value when i print it?

I'm trying to make a placement system that clones a model from the local script in ReplicatedStorage, parents it to a folder in the workspace, fires a remote event to the server so the server can clone "t", fires back a remote event towards the client to get the client to delete the original model, fires another remote event towards the server to get it to edit the position of the clone, and once the player presses the left mouse button, it places the model right where the mouse is. The problem is that the server never clones "t" and gives this error:

ServerScriptService.Scripts.EventController:25: attempt to index local 'p1' (a nil value)

How do I get p1 to stop being nil? (p1 is the name of the "t" value in the server script)

Server script:

signal.OnServerEvent:Connect(function(plr,ver,p1,p2,p3,p4)

local bdfl = {
    CloningEvent = function(p1,p2)
        print(p1,p2)
        if p1 ~= nil then --to find the error that I shoved above just remove the if, else and the end for them because this checks if p1 is not nil meaning that no error will output (set it like this because it always spammed my output when i was trying to test other things)
            print("works")
            local newClone = p2:Clone()
            newClone.Parent = gs.CurrentCourse.Turrets
            cloneEvent:FireClient("Backdoor",p1,p2)
        else
            print("p1 most likely nil again :|")
        end
    end,
    UpdateTurretPosition = function(p2,p3) --the new p2 and p3 updated by cloningEvent
    if p2 == nil then
        if p2:IsA('Model') then
            p2:SetPrimaryPartCFrame(p3) 
        elseif p2:IsA('BasePart')then
            p2.CFrame = p3
        end
    end
end
}

if ver == "Backdoor" then
    bdfl[p1](p2,p3,p4)
    end
end)

Local Script

signal.OnClientEvent:Connect(function(ver,p1,p2,p3,p4)
    local bdfl = {
        SetupTurret = function()
        local clp = true --Currently placing
        local lastrot = {
        x=0,
        y=0,
        z=0,
    }
        local t = game.ReplicatedStorage.Assets.Turrets.Wizard:Clone()
        t.Parent = gs.CurrentCourse.Turrets
--        towerNum = 1

        mouse.Button1Down:Connect(function() --this places the model down
            clp = false --Finished placing
        end)
        
        mouse.TargetFilter = t

        rs:Connect(function() --rs is render stepped
            if clp == true then
                if mouse.target ~= nil then
                    if mouse.Target.Parent.Parent == gs.CurrentCourse then --gs is a module script called game settings in serverscriptservice and currentcourse is the parent of the model that is being placed
                        print(t) --i printed t to make sure that t actually has a value and it outputed: Wizard but after i sent the fireserver, t somehow ended up nil...
                        signal:FireServer("Backdoor", "CloningEvent", t, CFrame.new(mouse.Target.Position.X,             ((t.PrimaryPart.Size.Y/2)+mouse.Target.Position.Y)+0.5, mouse.Target.Position.Z)*CFrame.Angles(0,lastrot.y,0))             
                    end
                end
            end
        end)
        
        local function onCloneEventFired(p2,p3)
            signal:FireServer("Backdoor", "UpdateTurretPosition", p2, p2.Position, p3)
            p2:Destroy()
        end    
    end
    
    if ver == "Backdoor" then
        bdfl[p1](p2, p3, p4) --bdfl is backdoor function list
    elseif ver == "Frontdoor" then
        signal:FireServer("Backdoor", p1, p2, p3,p4)
    end
end)