The fonts in the epub file are damaged, probably by whatever software
was used to subset them. Replace them with the non subsetted versions
using the calibre editor and they will convert fine.
If I have a moment, I will look into trying to work around the damage in
the conversion engine.
The fonts in the epub file are damaged, probably by whatever software
was used to subset them. Replace them with the non subsetted versions
using the calibre editor and they will convert fine.
If I have a moment, I will look into trying to work around the damage in
the conversion engine.