Code Generation plugin generate only the types for the SWAPI schema

[sachinira]

Currently I'm trying to generate a GraphQL client with Netflix's DGS framework. I used the schema of SWAPI as my Domain Graph Service’s GraphQL schema file. But the tool only generates only the Classes and Interfaces related to types. But do not generate the query API as expected. This is my build.gradle file

plugins {
    id 'org.springframework.boot' version '2.5.5'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
    id 'java'
    id("com.netflix.dgs.codegen") version "5.1.2"
}

group = 'com.clients.netflix'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web:2.5.5'
    developmentOnly 'org.springframework.boot:spring-boot-devtools:2.5.5'
    testImplementation 'org.springframework.boot:spring-boot-starter-test:2.5.5'
    implementation 'com.netflix.graphql.dgs:graphql-dgs-spring-boot-starter:4.8.3'
}

test {
    useJUnitPlatform()
}

generateJava {
    generateClient = true
    generateDataTypes = true
}

What can be the reason for this?