I'm trying to create a modpack, but when I modify the config to turn off the custom title and disable dragon griefing all entities become invisible.

log:
latest.log

minecraft: 1.16.5
version: 1.8.1

the only way to fix it, is to reinstall all the modpack, and when I retry the problem show up again.
I tried to remove, citadel, iceandfire and iceandfire tweaks but when i load the world the problem shows up again...