Illustrator breaks workflow with frequent 'can't finish previewing' error.

Ever since the latest update, I'm experiencing issues with Illustrator. It frequently turns my artwork into outlines and gives 'can't finish previewing' error.

Unless I quit illustrator and restart, there is no way of getting rid of that error.

I know there is some beta fix but that page is so 'un-user-friendly'. I couldn't locate the 'download' button.

This error is quite astonishing. Doesn't just break workflow but causes stress too.

Please help me fix this.