I am using Wistia API for video upload. The code seems to be fine and according to Wistia docs but when I upload a file, it shows the progress going from 0 to 100%, but after reaching 100%, following error is logged in console by sentry:

Uncaught TypeError: this.wRemoteRequestor.post is not a function

This error points to the wistia js file at https://fast.wistia.com/assets/external/api.js on following line:

 this.wRemoteRequestor.post(i, {
       dataType: "json",
       success: function(e) {
           r.transformToCreateMediaResponse(e),
           e.data.originalUrl = "".concat(r.generateExtensionlessOriginalUrl(o), ".bin"),
           r.wistiaUploader._onSuccessRaw(e)
       },
       error: function(e) {
           r.wistiaUploader._onError(e)
       }
    })

Following is the code:

 <div id="wistia-upload-widget" style="height:312px; width:500px;"></div>

  // Wistia Video Setup
  window._wapiq = window._wapiq || [];
  _wapiq.push(function(W) {
    window.wistiaUploader = new W.Uploader({
      accessToken: "{{wistia_access_token}}",
      dropIn: "wistia-upload-widget",
      projectId: "{{wistia_project_id}}"
    });

    wistiaUploader.bind("uploadstart", function(file) {
      window.onbeforeunload = confirmLeaveBeforeUpload;
      console.log("Upload has began: ", file);
    });

    wistiaUploader.bind('uploadsuccess', function(file, media) {
      console.log("Upload succeeded.");
     $.ajax({
        type: "POST",
        url: '{% url 'video:create' %}',
        data: {key: media.id},
        success: function (res) {
            window.onbeforeunload = confirmLeaveBeforePublish;
            $('#upload-init').addClass('hide');
            $('#video').val(res.data.pk);
            $('#video-thumbnail').addClass('hide');
            $('#uploaded-video').removeClass('hide');
        },
      });
    });

    wistiaUploader.bind('uploadembeddable', function(file, media, embedCode, oembedResponse) {
      console.log("Embeddable:", media);
    });

    wistiaUploader.bind("uploadfailed", function(file, errorResponse) {
      console.log("Upload failed:", errorResponse.error);
      alert("Unfortunately, your video failed to upload. Please give this information to support: " + errorResponse.error);
      window.onbeforeunload = null;
    });
  });

Note: Access token and project_id are coming from django and rightly placed.