Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - Bugs & Technical Problems DirectX Error

Simply follow the below-given fixes to get rid of DirectX errors:

Fix 1: Rollback to the Previous DirectX Version
Fix 2: Download Visual C++ Redistributables
Fix 3: Reinstall Graphic Card Drivers
Fix 4: Download the Missing .DLL Files

All the above-given fixes will allow you to overcome from DirectX errors.

Source: http://www.pcerror-fix.com/fix-directx-error-windows10-creators-update