What should I do if I receive an internal server error while uploading documents for my COE application at the Thai consulate?

A user is experiencing an 'internal server error' while uploading required documents for a Certificate of Entry (COE) through the Los Angeles consulate's website, despite being preapproved. They have reached out to the embassy but have not received a response. Comments suggest troubleshooting steps such as checking the entire screen for errors, changing browsers, and ensuring date formats are compliant with system requirements, as this issue may stem from improper date entries.