Discrepancy
Any mismatch between your documents and the terms of a letter of credit. The bank can refuse for it, however small it is.
Common examples: a goods description that does not match the credit, late presentation, a transport document of a type the credit does not allow, insurance for the wrong amount, and weights or party names that differ between documents.
A bank that refuses must send one notice listing every discrepancy within five banking days. It cannot add more later. Any discrepancy it did not list is waived.
If you can correct the documents and present them again before the presentation period ends and before the credit expires, do that. Otherwise the buyer decides whether to waive the discrepancy. That is a commercial decision between you and the buyer.