External fonts not displayed in Acrobat Reader - Page 1

Hello,

I have created a pdf using html2pdf and I'm able to get what I want (many thanks for this tool !). The only issue I have is that when I use Chrome or Sumatra pdf, everything is well displayed but if I want to use Acrobat reader, then, the text (done with an external font) is not displayed (only the backgroiund image is displayed).

Is there a specific command to use in order to have something that looks good in all viewers?
Regards
Pat

Just one info : if I switch back to standard font, then, everything is correct even with acrobat reader.
Do anyone encounted some issues to display external fonts with acrobat ?
Regards
Pat