I haven`t done this so far – maybe we have some forum members who know better.
For the beginning, which font did you "try to import"?
Sorry to find you in this trouble, however, there might be a slight misconfiguration while installing the font which we can rectify.
Please try following the instructions this thread - Self-Hosted Web Fonts which has the discussion around the similar issue as yours.
Let me know if this works for you.
thank you for a reply. I'm working with Sofia Pro font.
thank you for a reply. I'll check the thread and let you know if it worked for me.