is the file you’re trying to load on the classpath? is it under a source root?

it's in the source root

src folder

created by default when creating a lein project through IntelliJ

he was trying to run an existing project and it wasn't working, so we tried to create a new project from scratch and it still doesn't work

opening the same project on my computer works fine

are yous running the same ide/cursive version?