Hi This Love Music team,
I took a look at the files you've uploaded, and looks like we have 3 things to do to resolve this:
1. Try not to use Thai alphabets in your filename. For example, use "Track01.mp3" instead of "01.ไหนว่าไม่ลืม-ผ่องศรี วรนุช.mp3"
2. Please save the metadata file as .csv instead of .xlsx
3. It looks like you have created a folder called delivery.complete. What you need is a file named delivery.complete. You can do that by creating an empty textfile and renaming the filename.
Please try these and let us know if it works.