Cannot get resource when run/debug in IntelliJ IDEA

Question

I noticed that I am not able to get a resource when I run/debug a modularized Java 11 application within IntelliJ, but when I use Gradle's run task it works fine.

LoadResource.java

package com.example;

public class LoadResource {
    public static void main(String ... args) {
        new LoadResource().run();
    }

    private void run() {
        System.out.println("TEST");

        final var resource = getClass().getResource("Foo.txt");
        System.out.println(resource.toExternalForm());
    }
}

module-info.java

module LoadResource {
    exports com.example;
}

build.gradle

plugins {
    id 'application'
    id 'org.openjfx.javafxplugin' version '0.0.5'
}

sourceCompatibility = JavaVersion.VERSION_11
targetCompatibility = JavaVersion.VERSION_11

repositories {
    mavenCentral()
}

mainClassName = 'LoadResource/com.example.LoadResource'

UPDATE: Adding

run {
    doFirst {
        println commandLine
    }
}

shows that Gradle apparently executes [C:\Program...\bin\java.exe, -Dfile.encoding=windows-1252, -Duser.country=US, -Duser.language=en, -Duser.variant, -cp, D:\xxx\load-resource\build\classes\java\main;D:\xxx\load-resource\build\resources\main, null].

You can find my sample project here.