warning appears over website

[Gabriele Di flavio]

Hi,
my website shows errors of code.
In particular it shows many times (4 times before the header and 3 times before footer)
“Warning: Parameter 2 to bodycenter_search_by_title_only() expected to be a reference, value given in /web/htdocs/www.officinedelgrip.com/home/wp-includes/class-wp-hook.php on line 286”
how should i fix it? (or hide)
I attach screenshots that shows the situation.
thanks for support

Attachments:

1. 

   error.png
   

[Author]

Posts