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
var glyphsIds = "";
    var bias = 0;
    var range, start, end, codes;
    for (i = 0, ii = bmpLength; i < ii; i++) {
      range = ranges[i];
      start = range[0];
      end = range[1];
      startCount += string16(start);
      endCount += string16(end);
      codes = range[2];
      var contiguous = true;
      for (j = 1, jj = codes.length; j < jj; ++j) {
        if (codes[j] !== codes[j - 1] + 1) {
          contiguous = false;
          break;
        }
      }
      if (!contiguous) {
        var offset = (segCount - i) * 2 + bias * 2;
        bias += end - start + 1;
        idDeltas += string16(0);
        idRangeOffsets += string16(offset);
        for (j = 0, jj = codes.length; j < jj; ++j) {
          glyphsIds += string16(codes[j]);
        }
      } else {
        var startCode = codes[0];
        idDeltas += string16((startCode - start) & 0xffff);
        idRangeOffsets += string16(0);
      }