Adobe Express Branding Font not showing when editing AI Generated Templates

I have created a brand and uploaded my own fonts. Now I am testing out the Generate Template feature, every time I try to generate a template using the Branding, the preview of the template appears correctly, then I click on Edit Template and the text on the template does not appear, it is as if the text is transparent. Also each text box has an ! next to it.

The text is there in the text box, in fact if I change the font to one of the defaults it appears.