I'm using 1.12.2 version and changed the generator settings to "lostcities" on my server, however it does not generate. I brought in a single player world and beyond what chunks are generated it's not making any more city. On top of that, no variation of block (diamond, emerald, lava crystal, etc) works for the portal, it simply doesn't work. It acts as though the mod isn't even installed and it's becoming increasingly frustrating. The modpack is custom.