'Font loading error: downloadable font: kern: Too large subtable, table discarded

I am trying to use the "Open sans" font into my web page, and only in Firefox, I get this error in console:

downloadable font: kern: Too large subtable, table discarded

Here is the CSS:

@font-face {
    font-family: Open Sans;
    src: url(OpenSans-Semibold.ttf);
}
cssfirefoxfont-facefont-family


Solution 1:[1]

This is a problem in Firefox, which cannot handle Open Sans font in its entirety. The bug still exists as of Firefox v 75.0.

They have marked the problem WONTFIX in 2015:

Solution 2:[2]

I did some digging around and the issue seems to be with Open Sans subset itself.

This user (https://stackoverflow.com/a/16041637/4799071) seemed to run into the issue when they downloaded the font from Google Fonts. Try downloading it from Font Squirrel and see if that fixes it.

Solution 3:[3]

I had the same problem in Firefox 85. Try @developthewebz solution and it works. i downloaded the fontsquirrel web font (woff) and now there is no errors.

https://www.fontsquirrel.com/fontfacekit/open-sans

Solution 4:[4]

Open Sans from fontsquirrel has no full character set e.g. german, french, polish, etc. I downloaded latest version from Google Fonts and there is no errors.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 JN01
Solution 2 Community
Solution 3 serhumanos
Solution 4 Wojtek Suszycki

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