I got an error "Cannot find your OrgChart root...." when I configured OrgChart source as User Record -> OrgUnit ID
But I can set OrgChart root with specific root number, search in listing and click view in OrgChart, both work fine.
( There is no error in cds.log when visualized OrgChart. )
I used to done it in another client, OrgChart shown and I can create Scenario, so I configured in the same way in this cllient.
Is there any problem with the SAP Source Data? for example, relationship in HRP1001 or anything else.