Hello, I'm getting this error with my old world since updating the modpack to newest version.

Exception Reading: C:\PATH\level.dat
java.lang.RuntimeException: Tried to read NBT tag with too high complexity, depth > 512

Does anyone know how to fix it?

Thank you

Update: Found the issue, Mods--> Terrablender and Citadel are creating a loop of data in the world gen leading to a eventual nbt excess. All worlds created with these mods might suffer from this from time to time since it depends on how many times you use the world (log ins and outs)

Solution is to delete the world gen nbt files no less than 2 levels from root so it maintains world gen seed.

I hope the Modder reads this post and maybe solve this issue.