mainメソッドのあるファイルを実行してみたが、Main method not foundと表示される。

Question

前提

mainメソッドのあるファイルを実行してみたが、Main method not foundと表示され、SpringBootアプリケーションを起動実行できない。

実現したいこと

SpringBootアプリケーションを起動実行させたい。

発生している問題・エラーメッセージ

Main method not found in the file, please define the main method as: public static void main(String[] args)

The supplied phased action failed with an exception.
A problem occurred configuring root project 'chat-backend'.
Could not resolve all files for configuration ':classpath'.
Could not resolve org.springframework.boot:spring-boot-gradle-plugin:3.0.1.
Required by:
    project : > org.springframework.boot:org.springframework.boot.gradle.plugin:3.0.1
No matching variant of org.springframework.boot:spring-boot-gradle-plugin:3.0.1 was found. The consumer was configured to find a runtime of a library compatible with Java 11, packaged as a jar, and its dependencies declared externally, as well as attribute 'org.gradle.plugin.api-version' with value '7.6' but:
  - Variant 'apiElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.1 declares a library, packaged as a jar, and its dependencies declared externally:
      - Incompatible because this component declares an API of a component compatible with Java 17 and the consumer needed a runtime of a component compatible with Java 11
      - Other compatible attribute:
          - Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
  - Variant 'javadocElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.1 declares a runtime of a component, and its dependencies declared externally:
      - Incompatible because this component declares documentation and the consumer needed a library
      - Other compatible attributes:
          - Doesn't say anything about its target Java version (required compatibility with Java 11)
          - Doesn't say anything about its elements (required them packaged as a jar)
          - Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
  - Variant 'mavenOptionalApiElements' capability org.springframework.boot:spring-boot-gradle-plugin-maven-optional:3.0.1 declares a library, packaged as a jar, and its dependencies declared externally:
      - Incompatible because this component declares an API of a component compatible with Java 17 and the consumer needed a runtime of a component compatible with Java 11
      - Other compatible attribute:
          - Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
  - Variant 'mavenOptionalRuntimeElements' capability org.springframework.boot:spring-boot-gradle-plugin-maven-optional:3.0.1 declares a runtime of a library, packaged as a jar, and its dependencies declared externally:
      - Incompatible because this component declares a component compatible with Java 17 and the consumer needed a component compatible with Java 11
      - Other compatible attribute:
          - Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
  - Variant 'runtimeElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.1 declares a runtime of a library, packaged as a jar, and its dependencies declared externally:
      - Incompatible because this component declares a component compatible with Java 17 and the consumer needed a component compatible with Java 11
      - Other compatible attribute:
          - Doesn't say anything about org.gradle.plugin.api-version (required '7.6')
  - Variant 'sourcesElements' capability org.springframework.boot:spring-boot-gradle-plugin:3.0.1 declares a runtime of a component, and its dependencies declared externally:
      - Incompatible because this component declares documentation and the consumer needed a library
      - Other compatible attributes:
          - Doesn't say anything about its target Java version (required compatibility with Java 11)
          - Doesn't say anything about its elements (required them packaged as a jar)
          - Doesn't say anything about org.gradle.plugin.api-version (required '7.6')

該当のソースコード

package com.kenji.techpit.chat.chatbackend;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ChatBackendApplication {
	public static void main(String[] args) {
		SpringApplication.run(ChatBackendApplication.class, args);
	}
}

試したこと

・クラス名とファイル名が一致しているかどうか確認。

補足情報（FW/ツールのバージョンなど）

Windows10 64bit
Visual Studio Code 1.74.2
openjdk version "11" 2018-09-25
OpenJDK Runtime Environment 18.9 (build 11+28)
OpenJDK 64-Bit Server VM 18.9 (build 11+28, mixed mode)

Answer 1

【自己解決】
workspaceStorageフォルダを削除することで解決しました。

【参考】
https://www.aruse.net/entry/2019/07/28/163927