Vanilla Advancements GUI compatibility

[HaydoPotato1310]

This isn’t an issue, but I don’t know how to get my custom advancement trees to show up alongside the vanilla ones in minecraft. Please help. Version 1.20.4, PaperMC, using Viaversion and Viabackwards, along with some other plugins like teams and gravestones. It says, could not send advancements to Haydopotato1310 in console when I join. Also, upon completing an advancement, the chat message shows up but not the toast, even with minecraft-toast set to true.