What happened?

When loading the world preview before creating a world, if Biome Spawn Point is installed, the map fails to load and gives an error message.

Minecraft Version

1.20.1

Modloader (Fabric/Forge)

Fabric

World-Preview Version

1.2.1

Minecraft Logs

Log was too long to paste. I was using a large modpack.

Additional Information

https://www.curseforge.com/minecraft/mc-mods/biome-spawn-point
There are a lot of mods in the modpack but Biome Spawn Point made the difference. World Preview works without it.

What modpack are you using? I am unable to reproduce this with just biomespawnpoint-1.20.1-2.2.jar and collective-1.20.1-7.32.jar on fabric alone.

Could you please upload the log file to https://pastebin.com/ or, even better, attach it to a GitHub comment directly: