e-Invoice error: "Description of product or service is required"

Symptom. The submission fails with Description of product or service is required.

Cause. One or more detail lines on the document have an empty Description. LHDN requires a description on every line.

Fix. Edit the document, type a description on each line that has none (or delete empty lines), save, and resubmit.

Tip. Blank lines often come from a transferred Sales Order or an imported document; check the last rows of the detail grid.