Description
The ArcGIS Server machine cannot connect to the ArcGIS Data Store scene cache database because either the site is not trusted or cookies are not enabled on the ArcGIS Server machine.
Solution
Either enable cookies for the account running the ArcGIS Server service on the ArcGIS Server machine or add the URL of the ArcGIS Data Store scene cache database as a trusted site on the ArcGIS Server machine. See Common problems and solutions in the Portal for ArcGIS Administrator guide for instructions.