Resolve PHP-MySQL Deployment Error -- 2

I need an experienced developer to fix a deployment error in my application, which is hosted on Namecheap and Hostinger VPS. The backend is built with PHP and MySQL, and the frontend uses Flask. The primary issue is a server not responding, affecting the backend connection.

Key Requirements:
- Diagnose and resolve server response issues
- Ensure seamless connection between PHP backend and MySQL database
- Verify and stabilize the deployment on Namecheap and Hostinger VPS
- Test the application to confirm all components work perfectly

Ideal Skills and Experience:
- Strong expertise in PHP and MySQL
- Experience with Flask and VPS hosting environments
- Proficiency in troubleshooting server and deployment issues
- Ability to work efficiently to restore full application functionality

I'm looking for someone who can quickly identify and fix the problem to ensure my application runs smoothly.