iFrame empty for Looker SSO signed embedding with embed sdk

[nibo]

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/EmbedDa...

But neither helped.

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