Ok, out of the .zip file, brand new Foolcraft server, first thing when I start it, I get a crash report, your mod is causing it if I've read correctly so here's the crashlog for you maybe you can solve this issue ???

https://pastebin.com/SPfcCjpW

Caused by: java.lang.ExceptionInInitializerError
at com.teamwizardry.librarianlib.common.util.autoregister.AutoRegisterHandler.handle(AutoRegisterHandler.kt:32)
at com.teamwizardry.librarianlib.common.core.LibCommonProxy.latePre(LibCommonProxy.kt:51)
at com.teamwizardry.librarianlib.LateLoader.preInit(LateLoader.kt:13)

Still a bit to learn reading crash logs, that is the guy you need to reach out to, Team Wizardry

So who is TeamWizardry exactly, its not clear what mod is the culprit here, but your mod is involved according to lines down there around 270 to 273...

Talk to the devs of the pack, but it is not DE. That is diagnostic info of another mod putting in that info, the actual crash is in the upper part and what I pasted there.