What does an 'error in JSON structure validation in GST' specifically indicate?

This error signifies that the JSON data submitted for GST-related operations (e.g., GSTR-1, GSTR-3B, e-invoice, e-way bill) does not conform to the predefined JSON schema or structural rules mandated by the GST system. It means the format, data types, required fields, or nesting of elements are incorrect, not necessarily the data values themselves.