Project 'org.springframework.boot:spring-boot-starter-parent:2.3.0.RELEASE' not found

It seems that you are encountering an error related to the Spring Boot starter parent dependency with version 2.3.0.RELEASE. This error usually occurs when the specified dependency cannot be found in the repository or when there is an issue with the dependency declaration.

To resolve this issue, you can try a few troubleshooting steps:

1. Verify the dependency declaration: Double-check the spelling and syntax of the dependency declaration in your project's build file (e.g., pom.xml for Maven or build.gradle for Gradle). Ensure that the version number is correct and matches the available versions in the repository.

2. Clear local repository cache: Sometimes, the issue can be caused by a corrupted local repository cache. You can try deleting the contents of your local repository cache and re-downloading the dependencies. The location of the local repository varies depending on your build tool (e.g., ~/.m2/repository for Maven).

3. Check network connectivity: Ensure that your network connection is stable and capable of accessing the remote repository. Try pinging the repository URL or accessing it via a web browser to ensure that it is accessible.

4. Use a different version: If the specific version (2.3.0.RELEASE) is not available or causing issues, you can try using a different version of the Spring Boot starter parent dependency. Check the official Spring Boot documentation or repository for the available versions and select a suitable one.

If none of these steps resolve the issue, please provide more details about your project setup, build tool, and any relevant error messages, so that I can assist you better.