Server log:
message.txt

Detailed Crash report:
crash-2021-06-05_23.00.21-server.txt

Yes I have a big modpack, around 150 mods. I thank you for your attention.

It seems like the Eldritch Gown entity is causing a ticking entity crash while being attacked by an Entity. Looking at the details, did an Entity (that is not a Player) attack the Eldritch Gown? method_7372 is a method in PlayerInventory called getArmorStack, which is for some reason missing. The only explanation therefore is that the Entity that hit the Eldritch Gown must not be a PlayerEntity. Can you verify my conjecture?

Any feedback on this?

This is probably fixed in the latest commit on here.

Closing due to inactivity. Re-open if this is still an issue