Ok i resolved my problem myself. I just had to do a “generate files” for the third time on a unchanged project… (i’m still not sure why it worked this time).
For others who have this problem, you just need your “PublicIncludePaths.add” as normal, you don’t need “PublicDependency…”, and after you just have to go to your project source and right-click on your .uproject and “generate Visual studio files” and when you will be back on visual he’ll ask to refresh and it will work.