Q:

Minecraft 1.13.2 Advancement pack not loading

I'm trying to make an advancement system for a fnaf map I'm working on (don't judge).  I've never had problems getting custom advancements in the game before, but for some reason, It's only loading in the root advancement.  I'm using https://advancements.thedestruc7i0n.ca/ to generate the pack.  I have included a critera for every advancement.  Every advancement file looks like this:
{
    "__comment": "Made with TheDestruc7i0n's advancements generator: https://advancements.thedestruc7i0n.ca",
    "criteria": {
        "one": {
            "trigger": "minecraft:impossible"
        }
    },
    "display": {
        "title": {
            "color": "white",
            "text": "Survived Night One!" 
        },
        "description": {
            "text": "That wasn't so bad, now was it?" 
        },
        "icon": {
            "item": "minecraft:charcoal"
        },
        "frame": "task",
        "show_toast": true,
        "announce_to_chat": true,
        "hidden": false
    },
    "parent": "fnaf:progress"
}

When I run the command to get all advancements, only the root command gets obtained.  If someone knows what's going on here, I'd like to know. 
Edit: I've also tried to re-write the files by hand, like this, but even that had the same results. 
{
"display": {
    "icon": {
        "item": "minecraft:black_stained_glass"
    },
    "title": {"Night Progress"},
    "description": {"Track your progress"}
},
"parent": "fnaf:root"
},  
"criteria": {
    "progress": {
        "trigger": "minecraft:impossible",
            }
        }
    }
}

A:

Every advancement file looks like this

not sure if you've tried this and failed or not, but see if you can edit the advancement files to what you need them to be. 
if that fails, try to completely remove and readd the advancement pack and start over- there's a possibility it could've snagged.