This error has been occurring for some people using Genesis themes. The error looks something like this:
“Catchable fatal error: Argument 1 passed to Genesis_Admin_CPT_Archive_Settings::__construct() must be an instance of stdClass, instance of WP_Post_Type given, called in wp-content/themes/genesis/lib/admin/menu.php on line 122 and defined in wp-content/themes/genesis/lib/admin/cpt-archive-settings.php on line 38”
You may also be experiencing “the white screen of death” when you try to login to your WordPress admin area.
This is occurring if you were running an old version of Genesis (Genesis 2.3.0 or below) and WordPress updated to 4.6 or above. You needed to do the update to Genesis first.
You need to temporarily disable a part of Genesis, then login to WordPress and update it. Click here for instructions.