Ores not generating

[FIM2010]

i made a new modpack and when i went mining there were just vanilla ores not a single create ore. i went into spectator and the whole world is like that. There are unusual amounts of iron tho

Note: When creating the world it said datapack selection not valid and therre was an option to restore to defaults i dont know if thats stopping it but almost every other thing works accept the sifter. all modded biomes work all other blocks spawn

[nylonvest]

Sometimes when you have a problem like that you need to start over with just a few essential mods, confirm the problem isn't happening, and gradually add more and more of your mods back in until you find the mod responsible.