Secured Services / Web map from 10.6.1 in Experience Builder

[MarcoPoetsch]

Hi there,

I'm using the web version of the Experience Builder in ArcGIS Online.

When I try to include a web map or a secured service from our Enterprise (10.6.1) server I get following error:

Spoiler

Error

Invalid client_id

Error: 400

• The services and the web map are shared via a collaboration.
• Also: Once I close the error message window, the Experience Builder is not responding any resp. I can't add any more layers until I refresh the browser

Do I have to add the application to portal or to the trusted servers?

Cheers,

Marco