tôi gặp lỗi này

Nếu bạn không đọc được tiếng Anh, hãy sao chép văn bản bên dưới và dán vào trang Google Dịch:
https://translate.google.com

The Show Details button actually gives you the necessary info to resolve the problem yourself. Click on Show Details, record the info shown (it will show you the specific measure and the Part that contains that measure, as well as the specific issue that measure has), then go to the measure in question and fix the error. You can click to Save Anyway to make sure you don't lose your work.

Without that info from the Show Details button, no one can even begin to assist you. But to actually help, we need you to attach the score so that we can look at the place that's causing the error message. (In fact, most of the time when you ask for help, you'll need to attach the score.)