Custom Advancements

[73d1b34r]

I tried adding a datapack with custom advancements (using https://advancements.thedestruc7i0n.ca/), but it didn't work. While the root would show up, none of the children advancements would. I assumed that I had just done it wrong, so I uploaded the exact same datapack to a singleplayer server, but it worked perfectly fine. I double checked that I uploaded all the files to Minehut correctly multiple times, and the files were all in the correct spot (there were only 4 uploads, so I don't think it's really possible for me to have messed it up). I know it's possible to use custom advancements, cause the MoreMobHeads datapack uses it, and it works just fine. I honestly have no idea what could be causing this. Image below. Any info is appreciated. Cheers.
a/what its supposed to look like
b/ what it looks like in the server
c/what the website shows

*EDIT: The website shows an updated version of the datapack where the child advancements have a different icon, but the icon didn't fix anything upon updating it

Edited March 25, 2020 by 73d1b34r