This error essentially means CorelDRAW cannot communicate with its own core engine (the VGCore library). Fortunately, this is a known issue with a handful of reliable fixes.
Few things are more frustrating than sitting down to work on a design, double-clicking CorelDRAW 2020, and being greeted by a cryptic error message instead of your workspace. Unable To Load Vgcore Error Code 0 Coreldraw 2020
If you are seeing the pop-up: — don’t panic. You haven’t lost your files, and your software isn't permanently broken. double-clicking CorelDRAW 2020
Good luck, and may your vectors be smooth again! Unable To Load Vgcore Error Code 0 Coreldraw 2020