Spring Boot Gradle application "Error: Could not find or load main class" - spring-boot

Question

I have Spring boot Gradle project that runs perfectly local by Gradle, but not throw the jar file created.
The project has two targets: update data at Postgres DB from another api by scheduling, and let users get the data.
Application class:
I tried to deploy my project on Heroku, Google cloud and via java -jar command, I'm getting the same behavior.
I don't know if it's the problem but on the cloud the build runs successfuly, and after that I get the error: Error: Could not find or load main class com.Application . and ofcourse all the get requests gets denied and server is not accepts any requests.
my build.gradle
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:2.0.5.RELEASE")
}
}
plugins {
id 'java'
id 'idea'
id 'application'
id 'java-library'
id 'java-gradle-plugin'
id "com.heroku.sdk.heroku-gradle" version "2.0.0"
id 'org.springframework.boot' version '2.7.2'
id "io.spring.dependency-management" version "1.0.4.RELEASE"
}
apply plugin: 'java'
apply plugin: 'io.spring.dependency-management'
apply plugin: 'application'
apply plugin: 'idea'
apply plugin: 'org.springframework.boot'
mainClassName = 'com.Application'
sourceSets.main.java.srcDirs = ['src/main/java']
springBoot{
mainClass = "com.Application"
}
repositories {
mavenCentral()
}
configurations {
all*.exclude module: "spring-boot-starter-logging"
all*.exclude group: "ch.qos.logback"
all*.exclude module: "log4j-over-slf4j" // allow using log4j 2.x
all*.exclude module: "slf4j-simple" // log4j is the configured backend
}
dependencies {
implementation group: 'org.jsoup', name: 'jsoup', version: '1.14.3'
implementation('org.springframework.boot:spring-boot-starter-data-jpa')
implementation('org.apache.maven.plugins:maven-shade-plugin:3.0.0')
implementation('com.google.code.geocoder-java:geocoder-java:0.16')
implementation('org.springframework.boot:spring-boot-starter-web')
implementation 'com.fasterxml.jackson.core:jackson-databind:2.11.0'
runtimeOnly('org.postgresql:postgresql')
implementation ( 'org.projectlombok:lombok:1.18.20')
annotationProcessor ( 'org.projectlombok:lombok:1.18.20')
testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.2'
testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.2'
}
task cleanBuildPublish{
build.mustRunAfter clean
}
group 'com'
version '1.0-SNAPSHOT'
jar {
enabled =false
manifest {
attributes(
'Main-Class': 'com.Application',
)
}
}
bootJar {
manifest {
attributes(
'Main-Class': 'com.Application',
)
}
}
test {
useJUnitPlatform()
}
and my project structure :
the error I get on google cloud: