Okay guys, I know this one has been around a while but I finally fixed the glitch with Books of Nagash for Tomb Kings on the vortex campaign. (I just ran into it this morning)
So that works fine now.

Rewrote Chaos Invasion Script
-*Should* function smoother now, also hordes will now correctly spawn with the proper Ultimate Chaos buildings allowing them to rebuild thier hordes properly on the fly.
-Spawned Buildings are now split between mid and late game invasions with the End Times invasion having access to more powerful units.
**Note This new script will make invasions tougher, as they can recruit more of the more powerful UC units into thier hordes..so the world could burn quite fast.

Pleasure Cannons are no longer unbreakable.

Numerous bug fixes/General Improvements
Restructuring of the database for more effciency
Artillery Batteries are easier to disable now.

Corrected an issue with Diciples of Slaanesh Tooltip.
Fixed an issue with Perverse Aura.

Adjusted All HP values to be in line with Warhammer 2 changes (Increased HP values before/after):
Blessed 85-105
Bloodletters 140-200
changers 95-117
daemonettes 110-136
horrors 142-154
plague bearers 205-254
skulltakers 80-99
plague reapers 100-134
khorne nkights 98-100
fallen knights 75-80
nurgle knights 110-128
slaan knights 89-101
tzeentch nights 94-107
exalted knights 100-124
swordmasters 102-128
all cult units increased by 21%
cult master 3360-
cult master (mounted) 3860-
bloodthirster: 9800-10780
forsaken gaitn: 10390-11429
bloodthirster (exalt) 10800-11880
galraunch 10670-11730
great unclean one 11800-12980
loc 6650-7315
loc (exalt) 7650-8415
huskarls 60-68
khonr warriors 75-92
nurgle warriors 85-104
slaanesh warriors 60-74
tzeentch warriors 75-92
slaanesh chariot 1105-1158
slaanesh riders 80-95
flesh hounds 95-115
khonre lord 4260-4580
nurgle lord 4680-5420
slaanesh lord (3960-4600
tzeentch lord-4180-4740
nurgle sorc lord (foot) 4250-4674
tzeentch sorc lord (foot) 3750-4142
undivied sorc lord (foot) 3450-3800
slaanesh sorc lord (foot) 3650-4028
undivided sorc 3192-3512
slaanesh sorc 3332-3432
nurgle sorc 3992-4400
tzeentch sorc 3450-

If you want the comparison here sthe difference between warhammer 1/2 Vanilla chaos:
chosen hp 100-124 24%
chs warriors 67-82 22%
maruaders 57-70
heroes 3884-4280 (mount +400)
hounds 56-68
giant 11090-12612
loc 7425-8168
mounted wiz heroes 3600-3960
foot wiz heroes 3192-3512
lord foot 4012-4632
lords mounted 4512-5212
knights 100-114
sorc lord foot 3450-3800
sorc lord mounted 3884-4280 +400
chaos lords manti 4732-5460 +1180
sorc lord rasgons 4652-7300 +1840

chas l;ords dragons: 5224-7428
flagellents 52-63

wizard foot: 3512
wizard horse 3960 +448
wizard manticore 5096 +1136

heroes (foot) 3450-3800
heroes (horse) 3884-4280

Increased number of men for Chosen Swordmasters, Exalted Knights & Khorne Skulltakers.
Addressed a targetting issue with Blue fire of Tzeentch.
Addressed a targettting issue with Infernal Gateway.
Fixed Devoted to Slaanesh not reducing upkeep on Slaanesh units.
Fixed an issue with Favoured of Nurgle not properly giving Horde Replenishment.
Fixed an issue with "Corruption" skill requiring level 20.
Added Immortality to all heroes and wizards for Chaos.

Fixed an issue with Bloodletter Spacing.

Updated for Tomb Kings!
Minor chaos tweaks to bring it inline with TK changes.
Added Tomb Kings Chariots #4 building that adds Screaming Skull Catapult Batteries.
Added Screaming Skull Batteries to custom battles for TK factions.

CHANGES:
The Starting Units mod no longer changes horde buildings. (Dosnt work in Warhammer 2)
The Starting Units mod now changes Faction bonuses for the three leaders.
Merged foundation faction traits into the Ultimate Chaos ones.
Reverted the Norscan Maurader chain to default, elminating the can't upgrade visual bug.
Norscan tribes can now recruit Afflitced, Norse Huskarls, Chaos Bolt throwers and Fallen knights.
Chaos Bolt Throwers are now recruited from chaos cult building chain 3.
New hordes now start with mauraders chain 1 as well as cultist chain 1.
main and mauader buildings chains fixed for wh2. (No more visual upgrading bug)
Chaos cultists (all types) upkeep reduced.
Increased stream of corruption unit ability cooldown.
AI will now correcly build and upgrade chaos cult chains and altar chains.
Fixed an issue preventing targetting spells from flying mounts.
Adjusted maximum drag width for units.
Increased jump chance for flesh hounds
Adjusted unit grouping for AI Recruitment.
Fixed attrition effects for Ultimate Chaos units. (They no longer suffer attrition in frozen lands etc)
Norscan factions can now have access to fallen, huskarls & chaos bolt throwers in rebellions.
Removed Spears class to suit wh2
Cult polearms now correctly have charge reflector.
Plague Reapers no longer have charge reflector.
Fallen knights no longer cause fear.
Fixed hiding scaler on pink horrors
Fixed capture power on characters riding monsters.