itch.io

Ah, that stinks. I uploaded one of them successfully, so I was hoping there would be a way for me to upload another route. Thanks for letting me know. 

The filenames are all in English, it's just the contents have Japanese. That's where I'm stuck. I can't find any special characters in the filename.

I am using Tyranobuilder.

So I uploaded one route on browser no problem on itch.io, but the second route I upload gives me this error message:

Archive contains filename with non UTF-8 Encoded characters
Please try deleting the ZIP file and uploading another one.

Using visual studio code, I looked through the game files to see the problem. It highlighted Japanese characters as "not a basic ASCII character", and the route I successfully uploaded had the same issue...but uploaded regardless. Here's a screenshot:
https://imgur.com/a/GwgD8HF

Being an only English speaker and limited in coding knowledge, I'm at a loss on what to do. Please help. :(