Please read the guide for contributing before posting.

Minecraft version: 1.12.2 [change as necessary]
Wizardry version: 4.1.4 [change as necessary]
Environment: Singleplayer

Issue details: Loading a world after updating the mod

Other mods involved: It's a modpack IDK which one can cause a problem, the list of mods is available at the link below:

Link to crash report (if applicable): https://paste.dimdev.org/vufovaxugi.mccrash

Thanks!

Probably a duplicate of #253. Try updating Arcane Essentials to the latest beta version.

I don't have Arcane Essentials bro

@Tora-B At first glance it does look like it, but this is actually a separate issue.

@Tauma-png Which modpack are you using, which version of that modpack were you running before and which version are you running now?

May also be the same as #340. I think I'll add a safety check with a printout to the console so that this doesn't cause a crash, I don't know why it would happen (other than by removing spell packs) but it's client-side so it's unlikely to break anything that badly anyway.

Hey, thanks for answering, I'm using Roguelike Adventure and Dungeons modpack, I was running on the 1.36 and now on 1.37, I just created a new world and it works, seems that I cannot load a previous version world only

That makes sense. I've added a check so it won't crash the game any more, you may notice some weirdness when updating old worlds but it shouldn't affect the save.