After rebooting the Symantec Endpoint Detection and Response (SEDR) appliance, getting an error "Symantec EDR Manager is currently unavailable".
SEDR 4.6.8 and older
Known issue. SEDR services are failing to start.
Broadcom Engineering has resolved this issue in SEDR version 4.7.0. Please update the Symantec EDR to the latest version.
For more information please see: Symantec EDR Software Updates