Hi:
I uploaded backup that was built with page-builder (beaver). I changed the theme from x-theme to x-pro. When I tried to edit the page with “Edit with Pro”, I get a blank page with a line “page ok” on the top left corner!!! I have deactivated the cornerstone plugin.
When I tried to activate the cornerstone plugin I get the following error and cornerstone does not activate!!
Fatal error: Cannot redeclare class Cornerstone_Plugin_Base in /home/content/n3pnexwpnas03_data01/25/41536325/html/wp-content/plugins/cornerstone/includes/utility/plugin-base.php on line 6
In the wordpress dashboard, when I click “X-Pro->Launch” u get the “page ok” message page!!
How can get the Pro editor working??
One more think I noticed is that the URL of the page that shows “page ok” - does this give any clue??

Thanks in advance,
Ravi Upadhyaya