I have a operations dashboard application that uses a feature service and three table views (published with a feature service) as external data sources. When I go to add a new feature details widget if I choose one of the table views as the Data Source Ops Dashboard crashes immediately. Is this a bug? Am I doing something wrong? Is there a workaround?
I tested this out with a single and multi view dashboard and did not see any crashes. What version are you using? Could you share the URL for the service?
I think the issue here and why it's failing is due to the table missing an OID field. Can you try adding that (or trying a service with table with OID present) and see if that resolves it?