WPBakery won’t work for me. I noticed my Cornerstone plugin wasn’t activated. When I tried to activate it I got this message:
Plugin could not be activated because it triggered a fatal error.
Fatal error: Cannot declare class Cornerstone_Plugin_Base, because the name is already in use in /home/(my hosting account)/public_html/blog.donnabarnes.com/wp-content/plugins/cornerstone/includes/utility/plugin-base.php on line 6
So I tried deleting and reinstalling Cornerstone but I get this message: Installation failed: Installation package not available.
How can I reinstall Cornerstone successfully? And is the absence of Cornerstone causing WPBakery to not work?