Envato Grand Photography Theme. When you click Pages then Edit (Block Editor) it shows a blank page in white.
WordPress 6.5.4 running [GrandPhotography] theme
If I run in debug I see these messages
Deprecated: Function create_function() is deprecated in /home/margare8/public_html/wp-content/plugins/revslider/includes/framework/functions-wordpress.class.php on line 258
Notice: Function add_submenu_page was called incorrectly. The seventh parameter passed to add_submenu_page() should be numeric representing menu position. Please see Debugging in WordPress for more information. (This message was added in version 5.3.0.) in /home/margare8/public_html/wp-includes/functions.php on line 6078