The problem was with the theme of the website.
So the error was here:
/home/---/public_html/wp-content/themes/ifeaturepro/page.php on line 15
Here is the correction:
echo '<script type="text/javascript" src="https://use.typekit.net/ngr4yya.js"></script>' . "\n";
echo '<script type="text/javascript">try{Typekit.load();}catch(e){}</script>';
Strange. The person that coded the theme put HTML in the PHP.