@font-face {
    font-family: Titillium;
    src: url("<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function get_template_directory_uri() in /htdocs/wp-content/themes/gearup/custom-font.php:6
Stack trace:
#0 {main}
  thrown in <b>/htdocs/wp-content/themes/gearup/custom-font.php</b> on line <b>6</b><br />