Kitchen Sink MD won't compile correctly to android APK, font not found

I've been trying out some components and tried out the kitchen sink on my computer with Kivy. I've been fiddling around for the last couple of days and wanna go further with Kivy.

I've noticed that when I compiled the Android APK the kitchen sink bugs out. The app will start but go down in an IOError. To compile i use:

buildozer android debug deploy run logcat

Logcat gave me the error:

08-23 16:53:19.104 1184 1201 I python : IOError: File /data/user/0/erp.francis.nl.mysampleapp/files/kivymd/fonts/Roboto-Regular.ttfs not found

08-23 16:53:19.145 1184 1201 I python : Python for android ended.

08-23 16:53:19.146 1184 1201 I art : System.exit called, status: 0

It doesn't make sense to me. It looks for fonts, my buildozer spec is like mentioned in the docs. The fonts are loaded in kivy when run on the computer, so somewhere in compiling something goes wrong. Can somebody try to compile the Kitchen sink to an apk and confirm? I've been using some components just as-is without any problems. However, i would like to use Roboto anyway as a font. It's awesome :)