Can't use any downloaded fonts on XD.

Hi there. I just started messing around with XD and my biggest problem is that my fonts are not working on here, and XD is really not cooperating with me.

It says that all fonts are missing or unavailable, and when I click on the font menu, I just get a blank little rectangle.

What can I do? I don't use a font manager, and most of my fonts are scattered throughout my downloads folder. Moving all of these to a fonts foler would take hours, and even after moving one to test it, it changed nothing.