We have recently upgraded our single machine enterprise to 10.9 from 10.8.1. We can no longer embed webmaps or webapps in an ArcGIS Experience Builder application with the embed widgets. This include existing apps that was created in 10.8.1 and applications created in 10.9. The webmaps and webapps work fine with no issue.
In the developer console of chrome we get the following errors:
In the developer console of incognito, we get a 401 authorized access after logging in. We use our organization's IWA for single sign on and have disabled anonymous authentication for our portal site in IIS.
Again this issue only happened after upgrade.