Working several years in a specific program that uses a character font. Up to yesterday everything was "OK" but yesterday don't know why the font was missing most of the characters, instead of a blank cell.
Why this could happen? How to fix it? Where do "dig"?
Make a screenshot of the font, the font put in Yandex-disk (
https://yadi.sk/d/exwNPeXtrpoUd).