Ossia 3.0.10 don't work on MacPro 5.1 (Mojave)


I installed your awesome software on this computer, which worked…

But when I “start a new project” the application crashes instantly!

I tried to get around the problem by “loading a project” (then canceling the manipulation to access the software), but it’s unusable because too many functions and modules are missing…

What should I do ? Am I trying an older version? (if yes which one ?)
Is there something to do to fix this?
Something else ?

Thank you in advance for your attention to this matter !