I followed every single answer of this post Error: Could not find or load main class in intelliJ IDE but I still can't start my projet.
As you can see on the picture I setted src as a source folder using the Project Structure options but still it isn't working.

I also created an out folder and set it in the settings like this :

but it didn't help, I invalidated the cache and restarded intelliJ and my computer but nothing changed. I'm starting to run out of ideas and I'm really stuck now