CiviCRM Dasboard Disappeared
Try adding below lines into end of civicrm.settings.php file
global $civicrm_paths;
$civicrm_paths['civicrm.root']['path'] = '/path-to-wordpress/wp-content/plugins/civicrm/civicrm/';
$civicrm_paths['civicrm.root']['url'] = 'http://sitename.org/wp-content/plugins/civicrm/civicrm/';