
Attach (recommended) or Link to PDF file here:
[NAPEN16171380959.pdf](https://github.com/mozilla/pdf.js/files/6143802/NAPEN16171380959.pdf)

Configuration:
- Web browser and its version: Firefox 88 Nightly
- Operating system and its version: Windows 10
- PDF.js version:
- Is a browser extension: No

What went wrong? (add screenshot)
![](https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2021-03-15-10-58-27-ce2796.png)


platformId === 3 &&
            encodingId === 1 &&
            (hasEncoding || !potentialTable)
          ) {
            useTable = true;
            if (!isSymbolicFont) {
              canBreak = true;
            }
          } else if (isSymbolicFont && platformId === 3 && encodingId === 0) {
            useTable = true;
            canBreak = true;
          }
          if (useTable) {
            potentialTable = {
              platformId,
              encodingId,
              offset,
            };
          }
          if (canBreak) {
            break;
          }
        }
        if (potentialTable) {
          file.pos = start + potentialTable.offset;
        }
        if (!potentialTable || file.peekByte() === -1) {
          warn("Could not find a preferred cmap table.");
          return {
            platformId: -1,