C16C - Chrisy15's Civilisations for Civ 6

[Chrisy15]

Ur-Nammu needs to be updated.

I'm not interested in updating or maintaining said mod, or most of these mods, but the solution to your problem is probably to just replace the contents of C15_UrNammu_Config.sql with this:

INSERT INTO Players
					(Domain, 	CivilizationType,	LeaderType,				LeaderName,					LeaderIcon,					CivilizationName,			CivilizationIcon,						LeaderAbilityName,			LeaderAbilityDescription,			LeaderAbilityIcon,			CivilizationAbilityName,		CivilizationAbilityDescription,			CivilizationAbilityIcon,	Portrait,							PortraitBackground)
SELECT DISTINCT		 Domain,	CivilizationType,	'LEADER_C15_URNAMMU',	'LOC_LEADER_C15_URNAMMU',	'ICON_LEADER_C15_URNAMMU',	CivilizationName,			'ICON_LEADER_SUMERIA_C15_URNAMMU',		'LOC_TRAIT_C15_URNAMMU',	'LOC_TRAIT_C15_URNAMMU_DESC',		'ICON_LEADER_C15_URNAMMU',	CivilizationAbilityName,		CivilizationAbilityDescription,			CivilizationAbilityIcon,	'LEADER_C15_URNAMMU_NEUTRAL.dds',	'LEADER_HOJO_BACKGROUND'
FROM Players WHERE Domain IN ('Players:StandardPlayers', 'Players:Expansion1_Players', 'Players:Expansion2_Players') AND CivilizationType = 'CIVILIZATION_SUMERIA';

INSERT INTO PlayerItems
				(Domain,	CivilizationType,	LeaderType,				Type,	Name,	Description,	Icon,	SortIndex)
SELECT DISTINCT	Domain,		CivilizationType,	'LEADER_C15_URNAMMU',	Type,	Name,	Description,	Icon,	SortIndex
FROM PlayerItems WHERE Domain IN ('Players:StandardPlayers', 'Players:Expansion1_Players', 'Players:Expansion2_Players') AND LeaderType = 'LEADER_GILGAMESH';

Any further fixes are harder for me to hypothesise without having ever played with Gathering Storm or any DLC after it.