You need to have my core plugin EliMZ Book installed, somewhere above all other Eli Plugins.
You can download it on my main page here
Yes, how stupid I am. I didn't notice that. Now it starts working. :)
This pluging seems to override MZ's default font with the font defined in the "Default Font Index". Not a big problem. I just need to define the MZ default font in the plugin.
However, the plugin is not very compatible with Visu. I guess it's because Visu rewrite many windows and scenes.
Try put my font manager plugin, below all Visu plugins. The Eli Book can stay on the same place.
If that does not work, I may be able to make a ´patch if I know exactly what plugins, and what scenes or windows the fonts are not working. But for that, add me on discord:
hakuenstudio
And send me there a sample project replicating the problem. But in a way that I just need to hit playtest and open the scenes/windows to check.