hey! its likely a mod or dlc compatibility issue.
if ur on windows, go to:
C:\Users\[Username]\AppData\Local\Firaxis Games\Sid Meier's Civilization VII\Logs
there, you can open Database.log in notepad,
let me know what it says. ignore any "foreign key" errors, as these are to do with the custom mementos and don't prevent anything from working. "unique" and "missing" errors are the ones that can be fatal on startup.

error message with this, and da vinci