it was ran with the settings we want, we already fixed the first error: The first error we ran into was a known error with java. downgrading to 11 fixed this. the next issue were 2 conflicting mods which caused the load of the pixelmon mods to fail. Cause 1: Essential, Cause 2: Cloth API and Chest Cavity Forge. Cloth API works for Forge Neoforge and Fabric, but caused errors with Chest Cavity Forge. changing from Chest Cavity Forge to Chest cavity fabric fixed this issue as well.
Edit: Chest cavity fabric doesn’t work when ran and can corrupt the world, Only fix is to remove chest cavity.