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
);
        } else {
          glyf.data = newGlyfData.subarray(0, writeOffset);
        }
        return {
          missingGlyphs,
          maxSizeOfInstructions,
        };
      }
      function readPostScriptTable(post, propertiesObj, maxpNumGlyphs) {
        var start = (font.start ? font.start : 0) + post.offset;
        font.pos = start;
        var length = post.length,
          end = start + length;
        var version = font.getInt32();
        
        font.skip(28);
        var glyphNames;
        var valid = true;
        var i;
        switch (version) {
          case 0x00010000:
            glyphNames = MacStandardGlyphOrdering;
            break;
          case 0x00020000:
            var numGlyphs = font.getUint16();
            if (numGlyphs !== maxpNumGlyphs) {
              valid = false;
              break;
            }