Orchestrator environment was upgraded from an older version up to 8.18.1 and now is displaying errors of the vCenter plugin not showing properly and getting a notification of "pending reboot" for the status.
Orchestrator 8.18.1 and later
When upgrading the Automation with embedded Orchestrator, or the stand alone version of Orchestrator there can be times that the authentication that was set up gets cleared out as part of the upgrade and the system needs to have that completed again.
Starting with version 8.18.1 the Orchestrator control center UI is no longer available and authentication configuration must be done through the command line.
Access our documentation for the process: Configuring the Automation Orchestrator Appliance authentication provider with the command line interface
Or we also have a How To article within our knowledge base: How to Configure the Automation Orchestrator Appliance authentication provider on 8.18.x