无法在IntelliJ中运行Scala程序

Question

So I made a project in Scala -> Activator. I am trying to run it but I cannot even select it, it has a main function. When I press the alt+shift+F10 nothing happens at all.

The icon for the main.scala file also has some red thing in the bottom right corner, which I'm unsure what that means.

Also if I edit the file there is no star at the filename, like if it was unchanged.

Answer 1

Answering rather than deleting this question. I solved the problem by creating a Maven project or by using sbt, it will not run right out of the gate like Java (coming from a Java background).