Chart 5.6.0 fails validation if the FIM-related values are not set, even though values.yaml and its comments mark them optional. The values schema file listed coolingPeriod, crawlInterval, noAtime, and runAt as required, contradicting the docs.
This was a chart bug. The maintainers put up a fix removing those fields from the required list in the schema, shipped in the following chart release. Upgrade the chart past 5.6.0.