Latest version not replacing url on resolve of image uploader

[ShoaibShahid]

the below function was working fine

function (blobInfo, success, failure) {
const xhr = new XMLHttpRequest();
xhr.open('POST', ${environment.SITE_BASE_URL}filemanager/filemanager/upload.php);
xhr.onload = function () {
if (xhr.status !== 200) {
failure('HTTP Error: ' + xhr.status);
return;
}
const json = JSON.parse(xhr.responseText);
if (!json?.files[0]?.url) {
failure('Invalid JSON: ' + xhr.responseText);
return;
}
success(json?.files[0]?.url);
};
xhr.onerror = function () {
failure('Image upload failed due to a XHR error');
};

    const formData = new FormData();
    formData.append('files[]', blobInfo.blob(), blobInfo.filename());
    formData.append('fldr', '');
    xhr.withCredentials = true;
    xhr.send(formData);
  }

In latest version I replace the above with below

(blobInfo, progress) => new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.open('POST', ${environment.SITE_BASE_URL}filemanager/filemanager/upload.php);

      xhr.onload = () => {
        if (xhr.status !== 200) {
          reject('HTTP Error: ' + xhr.status);
          return;
        }

        const json = JSON.parse(xhr.responseText);
        console.log(json);
        if (!json?.files[0]?.url) {
          reject('Invalid JSON: ' + xhr.responseText);
          return;
        }

        console.log(json?.files[0]?.url);
        resolve('https://apiss.kualiteestaging.com/files/mceclip1.png');
      };

      xhr.onerror = (error) => {
        console.log(error);
        reject('Image upload failed due to a XHR Transport error. Code: ' + xhr.status);
      };

      const formData = new FormData();
      formData.append('fldr', '');
      formData.append('files[]', blobInfo.blob(), blobInfo.filename());

      xhr.send(formData);
    })

but on resolving the url is not getting placed but it was happening with first version. Is I am doing something wrong or missing or its abug