I found out myself, I had to comment out a line from the template:

dependencies {
    testImplementation(libs.junit)
    testImplementation(libs.opentest4j)

    // IntelliJ Platform Gradle Plugin Dependencies Extension - read more: https://plugins.jetbrains.com/docs/intellij/tools-intellij-platform-gradle-plugin-dependencies-extension.html
    intellijPlatform {
        // create(providers.gradleProperty("platformType"), providers.gradleProperty("platformVersion"))

        // Plugin Dependencies. Uses `platformBundledPlugins` property from the gradle.properties file for bundled IntelliJ Platform plugins.
        bundledPlugins(providers.gradleProperty("platformBundledPlugins").map { it.split(',') })

        // Plugin Dependencies. Uses `platformPlugins` property from the gradle.properties file for plugin from JetBrains Marketplace.
        plugins(providers.gradleProperty("platformPlugins").map { it.split(',') })

        // Module Dependencies. Uses `platformBundledModules` property from the gradle.properties file for bundled IntelliJ Platform modules.
        bundledModules(providers.gradleProperty("platformBundledModules").map { it.split(',') })

        testFramework(TestFrameworkType.Platform)

        webstorm("2025.2")
    }
}