Its my (like in owner, not user
) server, its complaining about the entity IDs in the console (setting the custom mod pack locally both on cleint and server as i want to play with a couple of friend. Having the right hardware, and the will to make the modifications i'm the one hosting it).
Nope, no divine RPG, there only Mo' Creatures that is adding mobs from what i know. I remember Invasion Mod complaining together with Ars Magicka on the first atempt (failed one) of adapting FTB:U to my needs. both those mods whre from what i've seen trying to reserve the entities around 100, and both were getting that refused. No invasion mod on now either.
Also, you might want to update you config for liquid metals, a recent tweak added the ability of turning of grinder, that adds a line to the config and makes the actual one obselete for the latest liquid metals version.
Edit: Infact, maybe add both for now, the latest version seems to have a little problem with texutres not laoding correctly... add maybe both config for now... they're pretty mcuh the same, give or take one line.