Hey Philippe,
you probably noticed our prices are low (few $, not hundreds or thousand of dollars), to keep the prices low we are now offering support here on the community forum. We try to answer everyday (today is sunday and I'm here answering)
So instead of repeating 1000x times the same answer and burn a lot of cash in support, we have decided to make the support public, so everyone can see what we are answering, this is reducing a lot the number of times we have to answer to the same question.
Please check this similar topic about bad fonts:
https://community.appdrag.com/topic/134/tm-troubleshoot-font?_=1596953322143
Something you could try is to convert your font to TTF with a tool like:
https://onlinefontconverter.com/
and then try to import the TTF version of your font
FYI we do have enterprise support, to have a 1 to 1 call + screensharing with someone from our team, cost for that is $95 for 1H