Unable to browse images on the CKEditor in the admin area
Have you looked to see if your civicrm.settings.php file is still in-tact? See if it is there and then make sure it has the correct permissions. In Drupal sites, it lives in sites/default/civicrm.settings.php.

Edit: In Wordpress sites, it should be in /wp-content/plugins/civicrm/civicrm.settings.php