Attach (recommended) or Link to PDF file here:
[test.pdf](https://github.com/mozilla/pdf.js/files/6270827/test.pdf)
Configuration:
- Web browser and its version:chrome 89
- Operating system and its version:win10
- PDF.js version: 2.4/2.7/2.8 no working
- Is a browser extension: no 

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/18545199/113852392-1ae26080-97cf-11eb-9dc9-0cecf52d267b.png)

What went wrong? (add screenshot)
![1617791294(1)](https://user-images.githubusercontent.com/18545199/113852355-10c06200-97cf-11eb-8672-598750f1093a.jpg)


console this log : **FormatError: TrueType Collection does not contain "DCWGQU+CambriaMath" font** 

any solution?thanks
this.error = error;
    this.loadedName = "g_font_error";
    this.missingFile = true;
  }
  ErrorFont.prototype = {
    charsToGlyphs: function ErrorFont_charsToGlyphs() {
      return [];
    },
    encodeString: function ErrorFont_encodeString(chars) {
      return [chars];
    },
    exportData(extraProperties = false) {
      return { error: this.error };
    },
  };
  return ErrorFont;
})();
/**
 * Shared logic for building a char code to glyph id mapping for Type1 and
 * simple CFF fonts. See section 9.6.6.2 of the spec.
 * @param {Object} properties Font properties object.
 * @param {Object} builtInEncoding The encoding contained within the actual font
 * data.
 * @param {Array} glyphNames Array of glyph names where the index is the
 * glyph ID.
 * @returns {Object} A char code to glyph ID map.
 */
function type1FontGlyphMapping(properties, builtInEncoding, glyphNames) {