When uploading a pdf file, I get Warning: Unimplemented widget field type "null", falling back to base field type at pdf.worker.js. The file is not loading.
I'm using the chrome browser. All other files are processed fine, but this one is not. Help solve the problem.
[usn2020.pdf](https://github.com/mozilla/pdf.js/files/5936611/usn2020.pdf)

if (value !== undefined) {
      if (stopWhenFound) {
        return value;
      }
      if (!values) {
        values = [];
      }
      values.push(value);
    }
    if (++loopCount > LOOP_LIMIT) {
      warn(`getInheritableProperty: maximum loop count exceeded for "${key}"`);
      break;
    }
    dict = dict.get("Parent");
  }
  return values;
}
const ROMAN_NUMBER_MAP = [
  "", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM",
  "", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC",
  "", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"
];
/**
 * Converts positive integers to (upper case) Roman numerals.
 * @param {number} number - The number that should be converted.
 * @param {boolean} lowerCase - Indicates if the result should be converted
 *   to lower case letters. The default value is `false`.
 * @returns {string} The resulting Roman number.
 */
function toRomanNumerals(number, lowerCase = false) {