What is this error: "Warning: could not load font system. Using default font."

So… The errors show up on:

The ipad but not the Mac Simulator  (2015.2545) 

The win simulator  but not the Android Phone (2015.2511) 

Super annoying when trying to debug… as It’s repeated over and over… Like when the game inventory is updated.

I wonder if it’s specific to my font? 

I assume it’s a TTF font?

If so, and you don’t mind, I could test it on my devices.

I’m only on Mac, but as you said you get the warning on iPad I could test in on my devices.

It would be really easy to test if it’s the font or not.