SYMPTOMS

Kerning tables are not present in the imported GN4 fonts.

CAUSE

Wrong import procedure, or original fonts didn't contain kerning pairs.

RESOLUTION

If you have AFM font, open it  in any ASCII editor, and check if there's a section with kerning pairs. Look for:

StartKernData

The line below it usually contain the number of kerning pairs:

StartKernPairs 512

If the kerning pairs are there, try to reimport font through Import AFM. If the kerning pairs are not there, nothing to do.

If you have only TTF font, be aware that sometimes the kerning pairs may be missing from the low-quality TTF fonts.