Font not working

I'm using Express trying to create templates for my organization to use and I realized our font in the brand wasn't working. It says "preview unavailable" when I look at it in the menu and then when I try to apply it to text I just get a little error symbol and it doesn't work. I just get a blank text box. I went into my Brand and figured I'd delete them and then try putting it back in. Well I deleted them, and then when I attempted to add it back in I got a "We're unable to add font. Please try again later" message. I've logged out and logged back in and it's still not working. I wanted to try reuploading the font but when I do that I get told it's a duplicate so it won't take it, but I can't actuall even access the old one now at all. 

This is our main brand font, so I need to be able to access it.