Can't upload custom fonts (files in folder not showing)

Hey there

I am trying to upload a folder of .ttf files (Google’s Roboto) to custom fonts. When opening the folder on my desktop, it shows the folder has 12 files, but when I open same folder during an attempt to try uploading to webflow in site settings, folder shows as ‘empty’. Why is this happening, and any advice on what to do?

Here is my site Read-Only:Webflow - Aimee's Stunning Site