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
accent,
          width,
          vmetric,
          operatorListId,
          isSpace,
          isInFont
        )
      ) {
        glyph = new Glyph(
          fontChar,
          unicode,
          accent,
          width,
          vmetric,
          operatorListId,
          isSpace,
          isInFont
        );
        this.glyphCache[charcode] = glyph;
      }
      return glyph;
    },
    charsToGlyphs: function Font_charsToGlyphs(chars) {
      var charsCache = this.charsCache;
      var glyphs, glyph, charcode;
      
      if (charsCache) {
        glyphs = charsCache[chars];
        if (glyphs) {
          return glyphs;