Could you please provide the database.log file which you will find in in the folder documents/my games/sid meier's civilization VI/Logs? After you launch the game with the mod enabled and it crashes, just open the database.log file and tell us what it says inside. Artdefs files will most certainly not cause you're game to crash, they're just for cosmetics, so you will probably have some error in your code.
[842018.379] [Localization]: StartupErrorMessages.xml
[842018.379] [Localization]: Input XML does not contain database entry tags. GameData, GameInfo or Database
[842022.795] [Localization]: Validating Foreign Key Constraints...
[842022.795] [Localization]: Passed Validation.
[842022.864] [Configuration]: Validating Foreign Key Constraints...
[842022.865] [Configuration]: Passed Validation.
[842034.942] [FullTextSearch]: Initializing FullTextSearch
[842035.774] [Gameplay]: Validating Foreign Key Constraints...
[842035.786] [Gameplay]: Passed Validation.
[842036.563] [Configuration] ERROR: no such table: Types
[842036.563] [Configuration]: In Query - insert into Types('Type', 'Kind') values (?, ?);
[842036.563] [Configuration]: In XMLSerializer while updating table Types from file Template_Buildings.xml.
[842036.573] [Configuration] ERROR: no such table: Types
[842036.573] [Configuration]: In Query - insert into Types('Type', 'Kind') values (?, ?);
[842036.573] [Configuration]: In XMLSerializer while updating table Types from file Template_Units.xml.
[842036.573] [Configuration]: Validating Foreign Key Constraints...
[842036.573] [Configuration]: Passed Validation.
[842054.298] [FullTextSearch]: FTS - Creating Context
[842058.541] [FullTextSearch]: FTS - Creating Context
[842062.298] [Configuration]: Validating Foreign Key Constraints...
[842062.298] [Configuration]: Passed Validation.
[842064.076] [Configuration] ERROR: no such table: Types
[842064.076] [Configuration]: In Query - insert into Types('Type', 'Kind') values (?, ?);
[842064.076] [Configuration]: In XMLSerializer while updating table Types from file Template_Buildings.xml.
[842064.077] [Configuration] ERROR: no such table: Types
[842064.077] [Configuration]: In Query - insert into Types('Type', 'Kind') values (?, ?);
[842064.077] [Configuration]: In XMLSerializer while updating table Types from file Template_Units.xml.
[842064.077] [Configuration]: Validating Foreign Key Constraints...
[842064.077] [Configuration]: Passed Validation.
[842072.123] [Gameplay] ERROR: FOREIGN KEY constraint failed
[842072.123] [Gameplay] ERROR: FOREIGN KEY constraint failed
[842072.123] [Gameplay]: Validating Foreign Key Constraints...
[842072.125] [Gameplay] ERROR: Invalid Reference on Buildings.TraitType - "TRAIT_CIVILIZATION_BUILDING_WAKANDAN_RESEARCH_FACILITY" does not exist in Traits
[842072.133] [Gameplay] ERROR: Invalid Reference on Traits.TraitType - "TRAIT_CIVILIZATION_WAKANDAN_FIGHTER" does not exist in Types
[842072.133] [Gameplay] ERROR: Invalid Reference on Traits.TraitType - "TRAIT_CIVILIZATION_WAKANDAN_RESEARCH_FACILITY" does not exist in Types
[842072.133] [Gameplay] ERROR: Invalid Reference on Traits.TraitType - "TRAIT_CIVILIZATION_WAKANDAN_WARRIOR" does not exist in Types
[842072.134] [Gameplay] ERROR: Invalid Reference on Units.UnitType - "UNIT_WAKADAN_FIGHTER" does not exist in Types
[842072.135] [Gameplay] ERROR: Invalid Reference on UnitAiInfos.UnitType - "UNIT_WAKANDAN_FIGHTER" does not exist in Units
[842072.135] [Gameplay] ERROR: Invalid Reference on UnitAiInfos.UnitType - "UNIT_WAKANDAN_FIGHTER" does not exist in Units
[842072.135] [Gameplay] ERROR: Invalid Reference on UnitReplaces.CivUniqueUnitType - "UNIT_WAKANDAN_FIGHTER" does not exist in Units
[842072.135] [Gameplay]: Failed Validation.
[842073.561] [Configuration] ERROR: no such table: Types
[842073.561] [Configuration]: In Query - insert into Types('Type', 'Kind') values (?, ?);
[842073.561] [Configuration]: In XMLSerializer while updating table Types from file Template_Buildings.xml.
[842073.562] [Configuration] ERROR: no such table: Types
[842073.562] [Configuration]: In Query - insert into Types('Type', 'Kind') values (?, ?);
[842073.562] [Configuration]: In XMLSerializer while updating table Types from file Template_Units.xml.
[842073.842] [Configuration]: Validating Foreign Key Constraints...
[842073.842] [Configuration]: Passed Validation.
[842074.215] [FullTextSearch]: FTS - Creating Context