SlimerJS do not execute the scenario

I am trying to execute a test with slimerJS but the scenarios are not executed.
I have this output:

What appear when I execute the test is this screen:

When I execute the test, an windows with slimerjs pop up but no test really occur.
I set up the engine as "engine": "slimerjs".
The same test run without problem with puppeteer and chomy.
Should I set up more steps and update files and paths?