Getting the same error.
Warning: Declaration of QuietSkin::feedback($string) should be compatible with WP_Upgrader_Skin::feedback($string, ...$args) in /home/cosmolyr/public_html/aspXXXXXXXuths.com/wp-content/plugins/ocean-extra/includes/wizard/classes/QuietSkin.php on line 12
But, after I disabled the plugin Ocean Extra, the site is working fine.
