The last version broke with Elementor

It’s not just Elementor. Looks like v1.3 of this broke for everyone as the CSS it generates is incorrect.

I’ve created my own support conversation but it’s awaiting moderation.

If you want to fix it until there is an update you’ll need to edit the file:

classes/class-bsf-custom-fonts-render.php

in the plugin and make a change on line 359 from:

foreach ( $value as $font_file ) {
  $font_face_css .= 'src: ' . $font_file . '; ';
}

to:

$font_face_css .= 'src: ';
$font_face_css .= implode(',', $value);

Thank you very much boss, you save my life.