Do other map areas Work? (Black Cove, End of Time)

Were you able to enter before and then it started crashing, or is the first time entering in your current save?

Did you try lowering the game resolution or graphics settings to see if that would help?

For the Steam version, did you try verifying local files? In the Steam library, right click on Divinity Original Sin and select Properties, switch to the Local Files tab and then click on the 'Verify Integrity of Game Cache...' button.

Are you shutting down all non-essential programs (especially anti-virus) before starting the game?