Jaspersoft Studio Single Select Query Fix

I am using PostgresSQL with Jaspersoft Studio and facing a specific issue with my single select query. The problem isn't tied to a syntax error, query execution time, or incorrect data output, but rather with the query not returning the expected value.

I need an experienced Jaspersoft Studio expert who can diagnose and rectify the problem with the single select query.

Key requirements:
- Proven experience with Jaspersoft Studio
- Strong understanding of SQL, specifically with PostgresSQL
- Ability to diagnose and fix query-related issues
- Clear communication to explain the problem and solution in a simple, understandable manner.

Issue:
DateFrom is a Single Select Query is being calculated based on another Parameter. But when I try to use in JRXML Report, it is showing as NULL.

Provide me with a Solution and if your Solution works. I will send the payment right away.

Thanks

Your task will involve troubleshooting and fixing the query to ensure it returns the expected value.