OTF causes fatal error when installing – DSIG mistake?

[mekkablue (Rainer Erich Scheichelbauer)]

Which version of macOS? In some system versions it depends from where you install the font.

See the related tutorials please:

Eliminating font cache problems | Glyphs

Importing existing fonts | Glyphs

Update: see this related post/thread:

Font Validation Errors

Do not trust the validation of Font Book, it is very buggy. Most validation errors are triggered by the way the font is installed, e.g. if you double click a font from within the Adobe Fonts folder, Font Book will tell you the font is broken. If you drag the file on the desktop first and install from there, you don’t get the error.