The OreSpawn 1.12.2 versions require this fixed/cracker mod to allow your game to launch
with the orespawn development versions installed, since the checker server that orespawn
pings to to check if you bought something or not does not work anymore and will not be
returning, so you MUST install this additional mod if you want to load your game.

It's nice and easy, just download this jar and put it in your mods folder.

And if you're still confused about what jar I'm speaking about, here's a direct link:
http://iredmc.us.to/pub_cdn/MinecraftArchive/DangerArchive/OreSpawn/1122/PremiumCrashFixMod/OrespawnPremiumCracker-1.12.2-v1.0.jar