在“启动 JCuc”期间出现内部错误。java.lang.NullPointerException

问：

在 Eclipse 中，在签出 Cucumber 时，我尝试运行一个包含以下条目的 Junit 类：

@RunWith(Cucumber.class)
public class JCuc {

}

此外，随附的 Java 主类具有以下条目

public class LoginStep {
@Given("^the url is present$")
public void the_url() throws Throwable {
    
}

@Given("^the website is loaded$")
public void the_website_is_loaded() throws Throwable {
    
}

@When("^Enter valid user name$")
public void enter_valid_user_name() throws Throwable {
    
}

@When("^Enter valid password$")
public void enter_valid_password() throws Throwable {
    
}

@Then("^I validate signin$")
public void i_validate_signin() throws Throwable {
    
}
}

使用 Junit 4 运行时，出现以下错误：错误 screenprint

以上在Eclipse Neon上工作正常 但我在 Eclipse 2020-03 （4.15） 中遇到错误

这是日志条目：

!ENTRY org.eclipse.core.jobs 4 2 2020-04-27 20:45:51.730
!MESSAGE An internal error occurred during: "Launching JCuc".
!STACK 0
java.lang.NullPointerException
    at org.eclipse.jdt.junit.launcher.JUnitLaunchConfigurationDelegate$ClasspathLocalizer.localURL(JUnitLaunchConfigurationDelegate.java:715)
    at org.eclipse.jdt.junit.launcher.JUnitLaunchConfigurationDelegate$ClasspathLocalizer.entryString(JUnitLaunchConfigurationDelegate.java:704)
    at org.eclipse.jdt.junit.launcher.JUnitLaunchConfigurationDelegate$ClasspathLocalizer.addEntry(JUnitLaunchConfigurationDelegate.java:691)
    at org.eclipse.jdt.junit.launcher.JUnitLaunchConfigurationDelegate$ClasspathLocalizer.localizeClasspath(JUnitLaunchConfigurationDelegate.java:682)
    at org.eclipse.jdt.junit.launcher.JUnitLaunchConfigurationDelegate.getClasspathAndModulepath(JUnitLaunchConfigurationDelegate.java:631)
    at org.eclipse.jdt.junit.launcher.JUnitLaunchConfigurationDelegate.getVMRunnerConfiguration(JUnitLaunchConfigurationDelegate.java:196)
    at org.eclipse.jdt.junit.launcher.JUnitLaunchConfigurationDelegate.launch(JUnitLaunchConfigurationDelegate.java:257)
    at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:860)
    at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:719)
    at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1017)
    at org.eclipse.debug.internal.ui.DebugUIPlugin$2.run(DebugUIPlugin.java:1220)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

谁能帮忙？