ATP web console UI is not available after upgrade from ATP version 3.0.5 to version 3.1.0.
The elastcsearch fails to initialize database shards before reaching a set timeout.
ATP8840 model appliance upgraded from ATP Platform version 3.0.5 to one of the following: ATP Platform 3.1.0, ATP Platform 3.2.0, SEDR 4.0.0.
To prevent this issue, upgrade to Symantec Endpoint Detection and Response (SEDR) 4.1.0.
If you encounter this issue, contact Symantec Technical Support for assistance with restoring the UI.