I am trying to complete the "Certificate of Coverage" on https://vss.gov.vn/english/question/Pages/certificate-of-coverage.aspx. However, upon completion and hit send, I received the error message: "Sent Error: Infomation send contact@vss.gov.vn." My Vietnam social security number was 0296273627. My name is Nhan Thị Hồng Lộc. DoB: 07SEP1959. I would like to obtain the "Certificate of coverage" to verify my eligibility. I would appreciate it if you could advise me of the outcome as soon as possible. Thank you for your assistance in this matter.