Hi,
thank you @abwaita and @seank123 for replies.
I did ask my host and they said it is WC plugin what causing a problem.
I asked theme support also if there is a problem with theme.
Now I am waiting answer.
I disable WC plugin and update it, after that enable it and now no problems.
Notice: Undefined property: Vc_Updater::$title in /var/www/wp-content/plugins/js_composer/include/classes/updaters/class-vc-updating-manager.php on line 99
Notice: Undefined property: Vc_Updater::$title in /var/www/wp-content/plugins/js_composer/include/classes/updaters/class-vc-updating-manager.php on line 99
