Versions
Minecraft Version: [e.g. 1.16.5]
1.16.5
Minecraft Forge Version: [e.g. 36.1.4]
36.1.12
Mod Version: [e.g. 1.0.0]
2.0.0
Log files
Please append the log, debug-log and if available the crash-log files.
https://pastebin.com/9HuSHyMP
Describe the bug
Happened when a ghast tried to shoot fire charges. I'm not sure why it happened this time, because they've done it before and been fine. It happened in the overworld in a Quark lava lake thing.

To Reproduce
Steps to reproduce the behaviour:
Like I said above, not really sure. All I know is ghast fire blasts caused it in my case.

Expected behaviour
To not crash :)

Screenshots
N/A

Additional context
Nope

Similar crash when killing a wither for some reason. Might be because the wither was spawned inside a claimed chunk

Please test, if this Snapshot fixes the problem. (The jar is in the zip file, because jar-files can not be attached to issue comments.)

In this version mob griefing event without a valid entity (if the entity is null) will be ignored and the vanilla mob griefing game rule will be used.

MoreMobGriefingOptions-1.16.5-2.0.1-SNAPSHOT.zip

This issue/pull request has been automatically marked as inactive because it has not had recent activity. It will be closed if no further activity occurs.

Due to the lack of response, I assume that the version provided fixed the bug.
The fix was just released as version 2.0.1 on CurseForge.
Changelog: https://github.com/GeheimagentNr1/MoreMobGriefingOptions/wiki/Changelog-2.0.1
Download: https://www.curseforge.com/minecraft/mc-mods/more-mobgriefing-options/files/all

Just happened again, and again it's seemingly the exact same cause.

Issue confirmed for:

• Minecraft version: 1.16.5
  Mod version:  2.0.0

TODOs:

• Investigating for a longer period than a few minutes
• Investigate if there is an issue with the mobs of Quark

Are you playing on a multi or a single player world?

Multiplayer. Happened two more times, disabled the mod server-side for now

A theory I have, I'm using the forge version of immersive portals, and the lava lake I have, has a very large area of obsidian from water bucketing the area. I'm wondering if the ghast explosion is somehow interacting with immersive portals, trying to create a far too large portal. It may also be why ghasts and pigmen are spawning there for no apparent reason

Happens to me to, im playing enigmatica 6 and it crashes for the same reason, a fireball also entered the portal and when i made a portal elsewhere and came back to my base, entering the base's vicinity (at which the crash logs say that the ghast fireball is at)
where the ghast fireball would load makes me crash.

wrong Registry. Use ForgeRegistries.ENTITIES

^ probably not the issue. I think entity type might be null for projectiles? Not sure just put a check in :D