Actually, Radium already fixed this problem, here is the issue and the commit. That might be a reference.

Version

lithium-neoforge-mc1.21.1-0.14.0
neoforge: 21.1.72

Reproduction Steps

1. Open a world with both Lithium and AE2
2. open AE2's guide(either with the guide item, or by holding G on any AE2 item)
3. flip through the pages until you crash (not all pages crash)
4. actually, there is same problem for mods using AE2's guide book like ExtendedAE and AdvancedAE.

Crash Report File

view on Gist
file

Additional Information

Actually, Radium already fixed this problem, here is the issue and the commit. That might be a reference.