java.lang.module.FindException during running multi-module Gradle application

Question

I have a simple Spring Boot application which is using Java modules functionality with Gradle. I have the following project structure:

my-project-structure

In root gradle settings files I have the following configurations:

---

~settings.gradle.kts
rootProject.name = "module-demo"
include(
  "core"
)
with(findProject("core")) {
  this?.name = "module-demo.core"
}

---

~build.gradle.kts
plugins {
    id("org.springframework.boot") version "2.6.7"
    id("io.spring.dependency-management") version "1.0.11.RELEASE"
    id ("java")
    id ("org.javamodularity.moduleplugin") version "1.1.1"
    kotlin("jvm") version "1.6.21"
    kotlin("plugin.spring") version "1.6.21"
    kotlin("plugin.jpa") version "1.6.21"
}

subprojects {
    apply(plugin = "java")
    apply(plugin = "org.javamodularity.moduleplugin")
}

group = "pl"
version = "0.0.1-SNAPSHOT"
java.sourceCompatibility = JavaVersion.VERSION_11

repositories {
    mavenCentral()
}

dependencies {
    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
    implementation("org.springframework.boot:spring-boot-starter-data-rest")
    implementation("org.springframework.boot:spring-boot-starter-web")
    implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
    implementation("org.jetbrains.kotlin:kotlin-reflect")
    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
    runtimeOnly("com.h2database:h2")
    testImplementation("org.springframework.boot:spring-boot-starter-test")
}

tasks.withType<KotlinCompile> {
    kotlinOptions {
        freeCompilerArgs = listOf("-Xjsr305=strict")
        jvmTarget = "11"
    }
}

tasks.withType<Test> {
    useJUnitPlatform()
}

---

Each time when I try to run this simple app using Run IntellIJ button I'm receiving:

Error occurred during initialization of boot layer
java.lang.module.FindException: Module dsi.moduledemo not found 

I don't have any idea what is wrong with my project setup. Below I include content of module-info.java file:

module dsi.moduledemo {
    requires spring.boot;
    requires spring.boot.autoconfigure;
    requires spring.context;
    requires kotlin.stdlib;
    exports dsi.moduledemo.app;
}

Sorry if it's a trivial question but it's my first touch with Java module mechanism with combination with Gradle plugin.