11 hours ago
A quick look around and some references to missing fonts but in other graphics applications.
Do you use accented or foreign characters ? I seem to remember that Gimp 3 now used font-sub-types or maybe it is a code page issue.
Are you exporting several pages in the PDF ? (Manga - thinking maybe a comic )
You could try a test,
Save your work as a Gimp .xcf file (to keep safe and for future use)
For each text layer, Layer -> Discard Text Information.
Export as a PDF.
Does that export ? Probably not what you want but shows that PDF works.
Do you use accented or foreign characters ? I seem to remember that Gimp 3 now used font-sub-types or maybe it is a code page issue.
Are you exporting several pages in the PDF ? (Manga - thinking maybe a comic )
You could try a test,
Save your work as a Gimp .xcf file (to keep safe and for future use)
For each text layer, Layer -> Discard Text Information.
Export as a PDF.
Does that export ? Probably not what you want but shows that PDF works.