Why is my Feature File failing to find the Step Definition?

Question

I have the following Feature File which is grayed out so I cannot run it from an IntelliJ Run configuration, nor from the right click context in the Feature File, though it runs fine from the Run.java runner:

Feature: A Test feature

Scenario: a test scenario
Given a test scenario

Running from this context gives: Error: Could not find or load main class cucumber.api.cli.Main

The following runner class:

package uk.co.mytests.steps;

import io.cucumber.junit.Cucumber;
import io.cucumber.junit.CucumberOptions;
import org.junit.runner.RunWith;

@RunWith(Cucumber.class)
@CucumberOptions(
    features = {"src/test/resources/features"},
    glue = {"uk.co.mytests.steps"},
    plugin = {"pretty", "html:target/cucumber", "json:build/cucumber- 
    test.json", "junit:build/cucumber.xml"})
    public class Run {
  }

The following StepDefinition class:

package uk.co.mytests.steps;

import io.cucumber.java.en.Given;

public class MyStepdefs {
    @Given("a test scenario")
    public void aTestScenario() {
    System.out.println("My first Given step");
    }
}

The following dependencies in my gradle.build:

compile group: 'io.cucumber', name: 'cucumber-core', version: '6.8.1'
testImplementation 'io.cucumber:cucumber-java:6.8.1'
testCompile group: 'io.cucumber', name: 'cucumber-junit', version: '6.8.1'

And the following file structure in IntelliJ:

And the following IntelliJ plugins Cucumber for Java, Gherkin

I believe I may have the wrong Cucumber Main on the classpath as I think it should be io.cucumber.core.cli.Main, though my run configuration has this selected:

Answer 1

Your java is defined as a folder and not package try defining it as package and calling java.uk.co...

if you see the folder color scheme , it shows that green means the folder is test source ;

https://www.jetbrains.com/help/idea/content-roots.html#adding_content_root

if you scroll down you can see its not java but test folder needs to be green color. I am not sure how this is done in intellij

This is my project structure :

you can see that after src project everything else is a package. Eclipse project view shows project structure test>java>step definition as test.java.stepdefinition as they are defined as package

and in my runner :