Problem with fonts

Hello,

I have some problem with fonts.

add_filter( ‘avf_google_heading_font’, ‘avia_add_heading_font’);
function avia_add_heading_font($fonts)
{
$fonts[‘Roboto’] = ‘Roboto:400&subset=latin,latin-ext’;
return $fonts;
}

add_filter( ‘avf_google_content_font’, ‘avia_add_content_font’);
function avia_add_content_font($fonts)
{
$fonts[‘Roboto’] = ‘Roboto:400&subset=latin,latin-ext’;
return $fonts;
}

A add code to functions.php, to have avaiable ROBOTO font, both for heading and body.

But, fonts change themsleves, when i change the settings of colors, etc at enfold panel “general settings”.

In my browser i see roboto font, but when i eneter “contact” site, they change to deafult / arial.

What is wrong?