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
if (ttContext.tooComplexToFollowFunctions) {
          return;
        }
        if (ttContext.functionsDefined.length > maxFunctionDefs) {
          warn("TT: more functions defined than expected");
          ttContext.hintsValid = false;
          return;
        }
        for (var j = 0, jj = ttContext.functionsUsed.length; j < jj; j++) {
          if (j > maxFunctionDefs) {
            warn("TT: invalid function id: " + j);
            ttContext.hintsValid = false;
            return;
          }
          if (ttContext.functionsUsed[j] && !ttContext.functionsDefined[j]) {
            warn("TT: undefined function: " + j);
            ttContext.hintsValid = false;
            return;
          }
        }
      }
      function foldTTTable(table, content) {