Fonts not showing any preview

I’ve recently installed Fontbase. I’m sorting throught 5k fonts, and so far 5% of the fonts show no preview at all. Nothing in Styles, Glyphs or Waterfall either.

I tried installing the font, and activating it and it doesn’t change anything.

Working on Windows 11 Home 21H2 64 bit, FontBase 2.17.5

Hello @Vagabond, thank you for the post and welcome to the forum.
Are you able to see the glyphs for these fonts in the Family page?
Are you able to view this font file normally with default Windows tools?
Thank you again,
Yuriy
FontBase Dev Team