Deploy in railway not working with gradle.build.kt - spring-boot

Question

I need to deploy a aplication in railway, but any time returno this error:
Caused by: java.lang.ClassNotFoundException: br.com.zezinho.helpdesk
Error: Could not find or load main class br.com.zezinho.helpdesk
My path is correct.
github: https://github.com/Luciannodev/helpdesk-back
plugins {
java
id("org.springframework.boot") version "2.7.8"
id("io.spring.dependency-management") version "1.1.0"
}
group = "br.com.zezinho"
version = "0.0.1-SNAPSHOT"
java.sourceCompatibility = JavaVersion.VERSION_11
val mainClassName = "HelpDeskApplication.java"
configurations {
compileOnly {
extendsFrom(configurations.annotationProcessor.get())
}
}
repositories {
mavenCentral()
maven { url = uri("https://repo.spring.io/milestone") }
maven { url = uri("https://repo.spring.io/snapshot") }
}
dependencies {
implementation("org.springframework.boot:spring-boot-starter-data-jpa")
implementation("org.springframework.boot:spring-boot-starter-validation")
implementation("org.springframework.boot:spring-boot-starter-web")
implementation("org.springframework.boot:spring-boot-starter-security")
implementation("io.jsonwebtoken:jjwt-api:0.11.5")
implementation("io.jsonwebtoken:jjwt-impl:0.11.5")
implementation("io.jsonwebtoken:jjwt-jackson:0.11.5")
implementation("mysql:mysql-connector-java:8.0.28")
implementation("com.h2database:h2:1.4.200")
testImplementation("org.springframework.boot:spring-boot-starter-test")
annotationProcessor("org.projectlombok:lombok")
}
tasks.withType<Test> {
useJUnitPlatform()
}
tasks.jar {
manifest.attributes["Main-Class"] = "br.com.zezinho.helpdesk"
manifest.attributes["Class-Path"] = configurations
.runtimeClasspath
.get()
.joinToString(separator = " ") { file ->
"libs/${file.name}"
}
}