Refused to connect to telemetry-d.docusign.net in focused view

Hello, I am trying to embed docusign in Angular app but facing an issue where TelemetryWrapper API being failed for some reason under network tab. I have used a sample URL which is generated from MyAPICalls.

Docusign bundle.js is loaded upfront in index.html, 

<script src="https://js-d.docusign.com/bundle.js" async></script>

component.html

<div class="docusign-agreement-container"  id="signing-ceremony"></div>

component.ts

  addDocusign() {
    window.DocuSign.loadDocuSign('Integration-Key').then((docusign) => {
      const signing = docusign.signing({
        url: 'https://demo.docusign.net/Signing/MTRedeem/v1/...',
        displayFormat: 'focused',
        style: {
          /** High-level variables that mirror our existing branding APIs. Reusing the branding name here for familiarity. */
          branding: {
            primaryButton: {
              /** Background color of primary button */
              backgroundColor: '#333',
              /** Text color of primary button */
              color: '#fff',
            }
          },

          /** High-level components we allow specific overrides for */
          signingNavigationButton: {
            finishText: 'Custom Button Text',
            /** 'bottom-left'|'bottom-center'|'bottom-right',  default: bottom-right */
            position: 'bottom-left'
          }
        },
        frameAncestors: ["https://apps-d.docusign.com", "http://localhost", 'http://demo.docusign.net', 'https://telemetry-d.docusign.net'],
        messageOrigins: ["https://apps-d.docusign.com"]
      });

      /** Event handlers **/
      signing.on('ready', (event) => {
        console.log('UI is rendered');
      });

      signing.on('sessionEnd', (event) => {
        /** The event here denotes what caused the sessionEnd to trigger, such as signing_complete, ttl_expired etc **/
        console.log('sessionend', event);
      });

      signing.mount('#signing-ceremony');
    }).catch((ex) => {
      // Any configuration or API limits will be caught here
    });
  }

  ngAfterViewInit(): void {
    // this.addScript();
    this.addDocusign();
  }

Console errors - 

Any direction is much appreciated.

Few links where I took the references from - 

• https://developers.docusign.com/docs/esign-rest-api/esign101/concepts/embedding/docusign-js-embedded-reference/?_gl=1*1hxxjft*_gcl_au*MTU2NzExODQ0MC4xNzI5MTc1NTMz#introduction
• https://developers.docusign.com/docs/esign-rest-api/how-to/request-signature-focused-view/?_gl=1*13tfyku*_gcl_au*MTU2NzExODQ0MC4xNzI5MTc1NTMz
• https://developers.docusign.com/docs/esign-rest-api/esign101/concepts/embedding/embedded-signing/
• https://developers.docusign.com/docs/esign-rest-api/how-to/request-signature-focused-view/