Is there an existing issue for this?

• I have searched the existing issues

Observed behaviour

Expected behaviour

it shows me minecraft main title

Steps to reproduce

Maybe I should try to find what mod crashes with it

Crashlog

https://gist.github.com/rebarakuk/a15f0ecc2387770b68d7fd2191100dc6

Environment (Singleplayer/Server, etc.)

Singleplayer

Mod version

4.3.14

Minecraft version

1.12.2

Forge version

1.12.2 - 14.23.5.2860

Other mods

https://gist.github.com/rebarakuk/1a66757fe52d890432c2ebc6ba6c8705

With version 4.3.10, this bug doesn't happen.
Version 4.3.12, you wrote "Support for addon content in the Wizard's Handbook!" on Changelog.
I think this occurs the bug