Offline font gone on Android

Using an offline font following this tuto link text and everything works fine until I deploy to the real device where the font shows nothing, no text

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks