How can I resolve the image upload error in my poster shop?

I have a shop for posters and recently added a custom poster option where a user uploads an image. I did this by just using an HTML file input. Unfortunately when I have tested this I have come to realize that the images don’t show up in the order as an image, and instead as a Fakepath.(seems like it just comes from the filepath of the user)

How can I fix this?

Hi did you ever get this fixed? Having the same issue