Strict Standards: Declaration of Radium_Walker::start_lvl() should be compatible with Walker::start_lvl(&$output, $depth = 0, $args = Array) in /home/genesism/public_html/wp-content/themes/genesis/includes/functions/navigation/main-menu/menu-init.php on line 161
Strict Standards: Declaration of Radium_Walker::end_lvl() should be compatible with Walker::end_lvl(&$output, $depth = 0, $args = Array) in /home/genesism/public_html/wp-content/themes/genesis/includes/functions/navigation/main-menu/menu-init.php on line 161
Strict Standards: Declaration of Radium_Walker::start_el() should be compatible with Walker::start_el(&$output, $object, $depth = 0, $args = Array, $current_object_id = 0) in /home/genesism/public_html/wp-content/themes/genesis/includes/functions/navigation/main-menu/menu-init.php on line 161
Strict Standards: Declaration of Radium_Walker::end_el() should be compatible with Walker::end_el(&$output, $object, $depth = 0, $args = Array) in /home/genesism/public_html/wp-content/themes/genesis/includes/functions/navigation/main-menu/menu-init.php on line 161

Нужно перевести PHP в менее строгий режим сообщения об ошибках и отключить их вывод на экран.

Убедитесь, что константа WP_DEBUG в файле wp-config.php имеет значение false. Если это не поможет, попробуйте добавить рядом строку:

ini_set( 'display_errors', 0 );