Fix Joomla Application Loading Issue

My Joomla application is not loading after a version update. I'm seeing the error, "Class 'Joomla\Console\Application' not found."

Requirements:
- Diagnose the root cause of the loading issue.
- Implement a fix to restore application functionality.
- Ensure no data is lost during the process.

Ideal Skills and Experience:
- Strong experience with Joomla, particularly with version updates.
- Proficient in PHP and familiar with Joomla's architecture.
- Experience in troubleshooting and resolving Joomla-related errors.
- Good communication skills for providing updates during the process.