When I try to edit page using cornerstone, it gave a preview error saying there is some issue with the plugin. So, i deactivated the plugin and when I tried to re-activate cornerstone plugin, I receive the following error message:
Fatal error: Cannot redeclare cs_generate_data_attributes() (previously declared in /home/content/a2pewpnaspod05_data04/76/41547076/html/wp-content/plugins/tco-video-lock/functions/includes/cs/helpers.php:4) in /home/content/a2pewpnaspod05_data04/76/41547076/html/wp-content/plugins/cornerstone/includes/utility/helpers.php on line 167