What version of Linking Books are you using?
0.7.2.1

What version of NeoForge are you using?
21.1.83

What version of Minecraft are you using?
1.21.1

What modpack and modpack version are you using, if any?
None as of now. Indev modpack.

Paste a link to your log or crash report here. Use a service like GitHub Gist. No images, please.
https://gist.githubusercontent.com/Gbergz/6c3abb7347fc0a0dccbbbe4fdb16f194/raw/d837e2bcda2d3939774cb26901aea34c5ec5ba85/gistfile1.txt

Describe the bug
Server crash when booting

To Reproduce
Steps to reproduce the behavior:

1. Make a server.
2. Add mod.
3. Start server
4. Crash.

Expected behavior
No server crash.

Screenshots
No response

Additional context
No response

Thank you for sharing. I've done a variety of tests on a server environment to make sure things are stable now. Hopefully v0.8.0.0 should solve any problems. Modrinth CurseForge