Plugin action PDF Conjurer (backend) | Add text on PDF error: TypeError: Cannot read properties of null (reading 'defaultFonts')

HI,

I’m trying to use the PDF conjurer plugin, and add simple text to the PDF model. But i encounter this problem : Plugin action PDF Conjurer (backend) | Add text on PDF error:
TypeError: Cannot read properties of null (reading ‘defaultFonts’)

I already tried to change the font, i used the default font named Roboto (which seems to be IN the plugin).

I have really no idea how to resolve this problem…

Thanks !