Embedded Portal for ArcGIS configurable apps fail to load on a browser with 'Block third-party cookies' enabled.

Workaround

Workaround : Add [*.]arcgis.com cookie in the browser setting. However, this option is not feasible for publicly accessible resources.

Additional information:

The following article indicate the issue was resolved in December 2019

https://support.esri.com/en/technical-article/000022568 

There is also an existing enhancement request

ENH-000120109 : Allow embedded web maps and configurable apps to continue to work when the user has 3rd-party cookies blocked in the web browser.

Status : Tech Complete

The workaround is to add [*.]arcgis.com as an allowed cookie in the br

Steps to Reproduce