Can't run SBT project on IntelliJ

I’m doing a course from Coursera which as an assignment given out in SBT. No matter how much I try I can’t seem to be able to run that code. I keep getting some errors which aren’t very descriptive. I’ve attached a SS to provide a state of my system.

Also, I want to find a comprehensive article on how scala code is run. I keep encountering multiple ways to achieve this but none seem to work fully. Trial and Error is the only way forward.

Have you installed the scala plugin? (If not click on “settings” (the wrench) | plugins and search for scala.