Logo URL Change

Hello, I programmed the start page as index.html with Bootstrap. From this domain http://wordpress.p192652.webspaceconfig.de/epidermolysis-bullosa/ is then the Enfold Installation. When I click on the logo, I am always sent back to the index.html page. But I would like to stay on this domain. how is that possible?

I try it with this code in the function.php but it doesn’t work.

// Change Logo link
add_filter(‘avf_logo_link’,’av_change_logo_link’);
function av_change_logo_link($link)
{
$link = “https://kriesi.at”;
return $link;
}