Issue with local fonts - MIME type ('text/html') is not a supported MIME type

Hi,

I am trying to add the font "Winner Extended Bold". I've followed the instructions for adding a local font here: https://docs.generatepress.com/article/adding-local-fonts/ And I'm getting this console error: "Refused to apply style from 'https://exporodeo.wpengine.com/wp-admin/admin-ajax.php?action=ame_branding_output_admin_bar_css&hash=af1d2fef79680016&ver=5.7.2' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled."

Here's my style.css:

/* winner-extended - latin */
@font-face {
    font-family: 'Winner Extended Bold';
    font-style: bold;
    /* font-weight: 400; */
    /* src: url('../fonts/abel-v12-latin-regular.eot');  */
    /* IE9 Compat Modes */
    src: local(''),
         /* url('../fonts/abel-v12-latin-regular.eot?#iefix') format('embedded-opentype'),  */
         /* IE6-IE8 */
         url('https://exporodeo.wpengine.com/wp-content/uploads/2021/06/WinnerExtendedBold_font.woff2') format('woff2'), /* Super Modern Browsers */
         url('https://exporodeo.wpengine.com/wp-content/uploads/2021/06/WinnerExtendedBold_font.woff') format('woff'), /* Modern Browsers */
         /* url('../fonts/abel-v12-latin-regular.ttf') format('truetype'),  */
         /* Safari, Android, iOS */
         /* url('../fonts/abel-v12-latin-regular.svg#Abel') format('svg');  */
         /* Legacy iOS */
  }

And here's my functions.php:

add_filter( 'upload_mimes', function( $mimes ) {
    $mimes['woff']  = 'application/x-font-woff';
    $mimes['woff2'] = 'application/x-font-woff2';
    $mimes['ttf']   = 'application/x-font-ttf';
    $mimes['svg']   = 'image/svg+xml';
    $mimes['eot']   = 'application/vnd.ms-fontobject';

    return $mimes;
} );

add_filter( 'generate_typography_default_fonts', function( $fonts ) {
    $fonts[] = 'Winner Extended Bold';

    return $fonts;
} );

Do you know what might be going on here?

Thanks!