Modpack version:
2.1.1

Java version:
8 but I don't know exactly, It's an only Minecraft server.

Description:
A mob kill me and the server instant crash.

When did the crash happen?
When Enthralled Dramcryx of DivineRPG kill me.

Steps to reproduce:

1. Find a Enthralled Dramcryx (I don't know if spawn it do the same but I think).
2. Change gamemode to surival if if you are not already.
3. Wait the mob kill you.
4. The server crashes.

Minecraft crash report:
I attach a file because the crash report is to big to be in pastebin....
crash-2021-08-31_20.06.54-server.txt

How much RAM did you dedicate to your client and how much RAM does your PC have?
The server have 12 GBs of RAM.

I tested this on a Singleplayer world, it didn't cause a crash there.

Questions:

• Did you try it on a server? (I know you said the server crashed, but that could still mean the SP internal server, so I'm just making sure.)
• Can you reproduce the issue? Does this always happen?

Could not reproduce. Until further information or corroboration is provided, this will be closed.