Minecraft 1.20.1
Forge 47.3.27

Mods
Forgified Fabric API 0.92.2+1.11.10+1.20.1

Steps to reproduce

1. Launch new instance as defined above
2. Click Singleplayer
3. Click Create New World

What was expected: Starting a new world
What happened: Game hangs on dirt background with no UI elements as the game crashed in the background.

Workaround: Downgrading to Forge 47.3.25 make the issue not appear.

Log: mclo.gs/8t7tItw

Context

As the log crashes at a EmeraldsForVillagerTypeItem: [Server thread/ERROR] [mixin/]: Injection error: LVT in net/minecraft/world/entity/npc/VillagerTrades$EmeraldsForVillagerTypeItem [...],

the obvious culprit could be the change in Forge 47.3.26, where the Forge changelog say:
47.3.26 Fix issues in VillagerTrades.EmeraldsForVillagerTypeItem related to custom Villager Types (#10315)

this is actually reported three other times already

Damn, I searched but found nothing 😨

Known issue, will be fixed by #191.

Fixed by #191