I try to build .jar with Spring Boot for Java8.
But,I get this message.

An exception occurred applying plugin request [id: 'org.springframework.boot', version: '1.5.21.RELEASE'] Failed to apply plugin 'org.springframework.boot'. Configuration with name 'runtime' not found.

I didnt know what ‘Configuration with name ‘runtime’ not found.’ means.
This is my Gradle, please help me to fix it. Thanks!

plugins {
    id 'java'
    id 'org.springframework.boot' version '1.5.21.RELEASE'
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
}

group = 'com.example'
version = '0.0.1-SNAPSHOT'

java {
    sourceCompatibility = 1.8
}

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web:1.5.21.RELEASE'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'

    implementation fileTree('dir': 'libs', 'include': '*.jar')

    implementation 'org.json:json:20231013'
    implementation 'io.jsonwebtoken:jjwt-api:0.11.5'
    runtimeOnly 'io.jsonwebtoken:jjwt-impl:0.11.5'
    runtimeOnly 'io.jsonwebtoken:jjwt-jackson:0.11.5'
}

tasks.named('test') {
    useJUnitPlatform()
}