The font is missing - ensure you have the font installed/activated.
Windows
To install a font
- Open Fonts by clicking the Start button , clicking Control Panel, clicking Appearance and Personalization, and then clicking Fonts.
- Click File, and then click Install New Font. ...
- In the Add Fonts dialog box, under Drives, click the drive where the font that you want to install is located.
Mac
How do I install fonts on my Mac? | Fontspring
Activate fonts
https://www.google.com/search?q=activating+fonts&ie=utf-8&oe=utf-8