I found three messages in the OSIsoft-PISymbols event log:
EVENT 323 Unable to save changes in configuration file at (username redacted) location; Error: PIServersAllowed.
EVENT 323 Unable to save changes in configuration file at /Coresight location; Error: An error occurred loading configuration file: Access to the path 'F:\Program Files\PIPC\Coresight\vidhsioq.tmp' is denied. (F:\Program Files\PIPC\Coresight\web.config)
EVENT 321 Failed to backup the config file at F:\Program Files\PIPC\Coresight\web.config location. Error: Access to the path 'F:\Program Files\PIPC\Coresight\web.config.backup' is denied. (Username redacted).
I have confirmed I am a member of the local groups Administrators, PI Coresight Administrators, PI Coresight Users, and PI Web API Administrators. I also went into IIS Manager and checked the security permissions for the web site. PI Coresight Administrators and Administrators have full control.
I don't know if this is a coincidence, but a short time earlier I did use PowerShell to backup the IIS Configuration using this command: Backup-WebConfiguration -Name IISConfigBackup
Could powershell have hosed me? How do I recover?