mod works fine till today. I'm on Fabric 1.20.1 with mod version 0.9.5

latest.log

My bad, try this log 2025-02-25-2.log

Can you please post the following:

• your config for Undead Nights
• another game log, but with the "print debug messages" config option for Undead Nights enabled
• do you have any mods installed, that change the tick speed?
• when does a crash happen, when a horde should spawn?

I don't know which mod that cause my world to have over 500 entities lol

Your second log seems to give you an error about having to many entities in your world.

I'm using the default config. I'll open the debug and try to send the log later

that seems to be the issue ;)

Maybe, I just try to spawn a horde but nothing happen

Undead Nights is not loaded in the log you attached