Q. Cannot see Nagash In campaign selection
A. Use required mods, you are probably missing Mixu unlocker

Q. In campaign you dont see Nagash Husk, only some generic vampire lord
A. Use required mods, you are probably missing MCT, or you have mod conflict

Q. Game crashes in battles
A. Dunno, maybe try redownloading the mod (unsubscribe, delete, resubscribe), it's possible that your mod file is corrupted

Q. SFO?
A. Sure you can make SFO patch by yourself, we won't

Q. Settlements dont grow
A. For special settlements like, Khemri, Lahmia, Nagashizzar ... (ones that are used for final victory tech), those settlements have unique building all the way to the left, right next to the main building to unlock growth
For Generic settlements there is growth rite

Q. I can see spirit hosts, spells and other special effects.
A. Use VFX mod, its in requirements

Q. Nagash is weak.
A. Complete (Nagash Rising) questline to get him to full power.

Q. Economy is broken, I dont have enough money
A. Its not, you just need to realise that this is horde faction, so you need to play it as one, small negative income is normal, you need to be razing and fighting to keep yourself up.
Horde income buildings are important too. And finally major generic settlements have building that can reduce upkeep of local armies, use it, it helps a lot.

Q. How to unlock mortarchs/mortarch technologies?
A. Complete their missions.