Sizing requirements are not met in the Performance Investigator server environment, including the Virtual Machine reservations. This is the most common cause for this issue.
Roll up errors to the SQL PI repository because the PI repository is down.
The Performance Investigator (PI) repository database is out of sync with the PI agents.
Insufficient sizing of the Foglight Agent Manager and SQL PI repository server environments. This is the most common cause for this issue.
Please refer to the Foglight for Databases Deployment Guide available for download from here for the most current sizing requirements for SQL PI environments.
Apply the latest SQL Server Cartridge to recreate/update the SQL PI repository which includes changes to references for the "spimssql" and "spiora" databases.
If the problem continues, send the FGLAM support bundle with the SQL PI repository, FGLAM with the DB agents, and FMS support bundle to the Support Team to further investigate. Please, include the screenshot and expand the Details link if it appears on the error message.