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Minecraft version: 1.12.2 [change as necessary]
Wizardry version: 4.1.4 [change as necessary]
Environment: Singleplayer/LAN game/Server All
Issue details: [describe what you were doing when the issue occurred, what went wrong, what you expected to happen, etc.]

Other mods involved: [only list mods that are relevant to the problem]

Link to crash report (if applicable): https://pastebin.com/SLKjdtWd

It appears newer versions of Forge have changed some methods such that wizardry tries to call a method that is no longer visible. I can't find anything in the forge changelog about it but for now it will work if you use build 2768, the recommended release on the forge download page.

still wont work

https://pastebin.com/ZLWqaLuP

Ok, interesting. All I can suggest at this point is try removing other mods until it works, particularly InventoryTweaks since it's a coremod.

We actually resolved this over Discord by creating a new profile that uses a separate Game Directory. There must have been some conflict with something that was in the default .minecraft directory, but I'm not sure what.

Nice, I'll mark this as closed then. It is generally a good idea to run in a separate directory to .minecraft, I personally have one for snapshots, one for modded 1.12, one for modded 1.11, etc.