Custom campaign won't show up in menu

[Baron Thincollar 0]

I am attempting to publish a custom campaign to the Steam Workshop. I have used Addon Builder and Publisher in BI Tools, but every time I generated a .PBO file of my campaign, the mission files and images would be missing. The campaign would also fail to display in the campaign menu in-game.

 

So, I tried Eliteness, and managed to create a .PBO containing all of my mission files, images, and other essentials. However, upon publishing the campaign and downloading, it still doesn't show up in the campaign menu. Moving the .PBO file to my addons and campaign folders in the ARMA 3 directory doesn't do a thing either.

 

Here's the contents of the .PBO file as seen in PBO Manager:

https://i.imgur.com/XkmNEFC.png

 

My description.ext is also below, in case that's a factor:

Spoiler

class NoEndings
{
    end1 = ;
    end2 = ;
    end3 = ;
    end4 = ;
    end5 = ;
    end6 = ;
    lost = ;
};

class MissionDefault : NoEndings
{ 
    lives        = -1;
    author        = "Baron Thincollar";
};

// additional parameters go here
weaponPool        = 1;

class Campaign
{
     name        = "The Apostles, Episode 1";
     briefingName    = "The Apostles, Episode 1";
    author        = "Baron Thincollar";
    overviewPicture = "\Campaigns\TheApostles1\images\apostles.jpg";
    overviewText    = "The Apostles are a private military company, formed by Spetsnaz operatives let go after the Second World War. They land on the Atlantic island of Malden, intent on stealing a nuclear weapon and selling it to the highest bidder.";

    firstBattle    = Chapter1;
    disableMP    = 0; 

    class Chapter1 : NoEndings
    {
        firstMission = Chapter1_Mission1;
        cutscene = "";

        class Chapter1_Mission1 : MissionDefault
        {
            briefingName = "Provocation";
            overviewText = "The Apostles attempt to extract a UN informant.";
            overviewPicture = "\Campaigns\TheApostles1\images\apostles1.jpg";
            
            end1 = Chapter1_Mission2; // other endings are defined by inheritance from MissionDefault, inheriting from NoEndings
            end2 = ; // end2 will end Chapter 1, therefore going to Chapter 2
            template = Provocation.Malden;
        };
        class Chapter1_Mission2 : MissionDefault
        {
            briefingName = "Bombs Away";
            overviewText = "With the location of the bomb secure, the Apostles make their move.";
            overviewPicture = "\Campaigns\TheApostles1\images\apostles2.jpg";
            
            
            end1 = Chapter1_Mission3; // other endings are defined by inheritance from MissionDefault, inheriting from NoEndings
            end2 = ; // end2 will end Chapter 1, therefore going to Chapter 2
            template = BombsAway.Malden;
        };
        class Chapter1_Mission3 : MissionDefault
        {
            briefingName = "Extirpation";
            overviewText = "The Apostles drive off the remaining ISS forces.";
            overviewPicture = "\Campaigns\TheApostles1\images\apostles3.jpg";
            
            
            end1 = Chapter1_Mission4;
            end2 = ; 
            template = Extirpation.Malden;
        };
        class Chapter1_Mission4 : MissionDefault
        {
            briefingName = "Occupation";
            overviewText = "With ISS and the UN off Malden, the Apostles prepare to sell the weapon.";
            overviewPicture = "\Campaigns\TheApostles1\images\apostles4.jpg";
            
            OnLoadName        = "Occupation";
            OnLoadMission    = "With ISS and the UN off Malden, the Apostles prepare to sell the weapon.";
            loadScreen        = "\Campaigns\TheApostles1\images\apostles4.jpg";
            
            end1 = ; // not defining the ending will use the Chapter ending corresponding to end1: Chapter2 here
            template = Occupation.malden;
        };
    };

};

 

Can anyone help? Thanks.