On load up, I get various errors:
Instance instanceRef construction_menu in file f:\steamlibrary\steamapps\common\age of empires iv\cardinal\attrib\instances\sbps\races\mongol\campaign\unit_ismail_cmp_mon.xml references an instance that doesn't exist (2b68be0ca3f34580bb867f188bb77459:menu\siege_engineer_field_construction_mon). Value changed to null.
Instance instanceRef ebp in file f:\steamlibrary\steamapps\common\age of empires iv\cardinal\attrib\instances\sbps\races\mongol\campaign\unit_ismail_cmp_mon.xml references an instance that doesn't exist (2b68be0ca3f34580bb867f188bb77459:ebps\races\mongol\units\campaign\unit_great_trebuchet_cmp_mon). Value changed to null.
Instance instanceRef ebp in file f:\steamlibrary\steamapps\common\age of empires iv\cardinal\attrib\instances\sbps\races\mongol\campaign\unit_ismail_cmp_mon.xml references an instance that doesn't exist (2b68be0ca3f34580bb867f188bb77459:ebps\races\mongol\units\unit_mangonel_3_field_construct_mon). Value changed to null.
Instance instanceRef ebp in file f:\steamlibrary\steamapps\common\age of empires iv\cardinal\attrib\instances\sbps\races\mongol\campaign\unit_ismail_cmp_mon.xml references an instance that doesn't exist (2b68be0ca3f34580bb867f188bb77459:ebps\races\mongol\units\unit_springald_3_field_construct_mon). Value changed to null.
Instance instanceRef ebp in file f:\steamlibrary\steamapps\common\age of empires iv\cardinal\attrib\instances\sbps\races\mongol\campaign\unit_ismail_cmp_mon.xml references an instance that doesn't exist (2b68be0ca3f34580bb867f188bb77459:ebps\races\mongol\units\unit_trebuchet_4_cw_field_construct_mon). Value changed to null.
Instance 'tuning_ai\tuning_ai' instantiated from template 'tuning_ai' is missing the list 'ai_info\gathering\depleted_resource_to_track_types'. A default has been created for it.
Instance instanceRef rally_pass_type in file f:\steamlibrary\steamapps\common\age of empires iv\cardinal\attrib\instances\ebps\races\hre\buildings\building_landmark_age1_palantine_chapel_hre\building_landmark_age1_palantine_chapel_hre.xml references an instance that doesn't exist (2b68be0ca3f34580bb867f188bb77459:pass_types\infantry). Value changed to null.
10897 instances validated in 3.4250172 seconds.
Post load hookup and validation complete.
Load complete.
1 warnings, 6 errors.
Additionally, when any changes are made to the Mongol race, it breaks the first town center in a skirmish with a tuning pack enabled.