With a trial version of Euclid Flex, it returns an error because neither preferredFamily or fontFamily is available in the file. But the rest is available (the Opentype.js Font Inspector does work).
cf. Euclid Flex's naming table:
This case should not return an error. Just show that the font name cannot be extracted from the file. It's not a serious error because the user knows the font name.
With a trial version of Euclid Flex, it returns an error because neither
preferredFamilyorfontFamilyis available in the file. But the rest is available (the Opentype.js Font Inspector does work).cf. Euclid Flex's naming table:
This case should not return an error. Just show that the font name cannot be extracted from the file. It's not a serious error because the user knows the font name.