Failed to execute 'setRequestHeader' on 'XMLHttpRequest'

[m-swat]

Hi,
i'm getting error like 'Failed to execute 'setRequestHeader' on 'XMLHttpRequest'' on 5xx error when retrying should occur.

Here is a full Error message:

SyntaxError:Failed to execute 'setRequestHeader' on 'XMLHttpRequest': 'function(header, parser) {
header = normalizeHeader(header);

if (!header) return undefined;

const key = findKey(this, header);

if (key) {
  const value = this[key];

  if (!parser) {
    return value;
  }

  if (parser === true) {
    return parseTokens(value);
  }

  if (_utils_js__WEBPACK_IMPORTED_MODULE_0__["default"].isFunction(parser)) {
    return parser.call(this, value, key);
  }

  if (_utils_js__WEBPACK_IMPORTED_MODULE_0__["default"].isRegExp(parser)) {
    return parser.exec(value);
  }

  throw new TypeError('parser must be boolean|regexp|function');
}

}' is not a valid HTTP header field value.`

It looks like the whole function definition is passed as a header value :o

I'm using the newest Axios version(1.1.3) and the newest retry-axios. No idea what is wrong. The same code is working fine with Axios 0.27.x.

Any idea what could be wrong?