"ITMS-90853: Invalid font" on TestFlight external testing

Question

I have uploaded build with Xcode 12 - iOS 14. I am getting following error in the TestFlight external testing.

Note: Build is working fine in internal testing.

App Store Connect Dear Developer,

We identified one or more issues with a recent submission for TestFlight review for your app, "XYZ" 1.0 (1.0.1). Please correct the following issues, then upload again.

ITMS-90853: Invalid font - There was an error validating the font named '' at 'XYZ.app/NORMAN.TTF'. Font basic parsability.

ITMS-90853: Invalid font - There was an error validating the font named '' at 'XYZ.app/FancyPants.ttf'. Font basic parsability.

ITMS-90853: Invalid font - There was an error validating the font named '' at 'XYZ.app/Alakob.ttf'. Font basic parsability.

ITMS-90853: Invalid font - There was an error validating the font named '' at 'XYZ.app/AlternateGothicEF-NoTwo_0.ttf'. Font basic parsability.

ITMS-90853: Invalid font - There was an error validating the font at 'XYZ.app/GothamRounded-Bold.ttf'. Font not supported by platform.

Best regards,

The App Store Team

I also found this apple forum thread but there is no solution provided.

Anyone have the solution for this?

Answer 1

After some research, it looks like iOS still only supports ttf/otf family of fonts and DOES NOT support woff family of fonts. Valid in June 2021 still.

Even if you're shipping a Hybrid app (like Cordova / Capacitor / Ionic thing) and WKWebView perfectly supports woff2 since forever - you'll still get ITMS-90853: Invalid font errors from "App Store Connect" Cerberus.