I'm trying to add a web map that I have in my arcgis online to Experience Builder's map widget. The web map works fine in the online map viewer, but it gives this error when trying to add into Experience Builder.
Within the Web Map I have a feature layer that is from aineistot.esri.fi which requires different credentials. I suspect that this feature layer is causing the issue. However, I do not know what to do about it?
Have you tried creating an item in your ArcGIS Org for the feature layer with stored credentials, and adding that to the map instead?
Do you get this error with any other maps?