I also encounter the (‘CFF’ glyph table instead of ‘loca’) message when using an otf font file (and version 3.10.0 of pd4ml). However I am able to instantiate a Font object and display / render some text without problems (in my rather simple test cases though).
-> do you happen to have / know if there is further information available on why this happens here? Maybe something related to the underlying pdf-creation-layer/lib?
Best regards and have a nice day