Getting error: Cannot access NLS data files or invalid environment specified

Question

Wrote a simple query for post api which is as follows:

SELECT * FROM TEST2 t WHERE t.correlation_id = 1;

However, getting the error that can not access nls datafiles or environment specified. Unable to understand how to resolve this. I am working at the windows machine. Any help or guidance would mean a lot. Thank You!

I tried to query data through post api using oracle database. but getting an error.