iFrame empty for Looker SSO signed embedding with embed sdk

Looker Q&A Looker
1

Hi,
we are trying to embed our dashboards in our

  1. NextJS frontend
  2. inside a React TypeScript component
  3. using the Embed SDK
  4. with signed SSO embed URLs

However, the embed is not working, we see a blank div, and there are no logs in the console, so we cannot debug it. We are following these documents: https://cloud.google.com/looker/docs/embed-sdk-intro#quick_example

and this example: https://github.com/looker-open-source/LookerEmbedReference/blob/main/Frontend/src/components/EmbedDashboard/EmbedDashboard.js

But neither helped.

I would be grateful for any support as it blocks us to use the Looker Embed Features.