HI,
In debug log I found two strange errors, repeated every day:
[25-Feb-2017 22:32:46 UTC] PHP Notice: Undefined variable: handler in /home/lugabglj/public_html/bg_wp/wp-content/themes/vantage/premium/addons/ajax-comments/ajax-comments.php on line 73
[25-Feb-2017 22:32:46 UTC] PHP Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in /home/lugabglj/public_html/bg_wp/wp-includes/functions.php on line 2679
10x