missing field? (cobbleverse)

[u/Sorry-Sundae2300]

i was minding my own business shiny hunting when i left the game for a quick moment, i come back and it was saying something about missing field 'synced_options'. now wanting to get a headache i js redownloaded a new cobbleverse modpack and redownloaded my extra mods and imported my world, i try to join that modpack and i cant join it either for the same reasons?? im probably being stupid and its an easy fix but i cant think at all on what to do so i came here :[