Diagnostic dashboard set (Performance dash, Log Analyzer dash, Agent Managers dash) missing from Navigation Panel. When going to Admin Console | Homes | Administration | Tooling and Diagnostics | Server Performance Overview (which is a Diagnostic dashboard), get error "view not found".
The Diagnostic dashboard set is supposed to appear at:
Admin Console | Dashboards | Foglight -or- Management Server (depending on Foglight version) | Diagnostic
we disabled and re-enabled the Diagnostic cartridge which is responsible for the Diagnostic set of dashboards (Performance dash, Log Analyzer dash, Agent Managers dash)
once we did this, the Diagnostic dashboard set displayed properly.