Fix Game Server Connection Issues

I'm seeking a skilled professional to resolve a critical issue with my APK game. The game is currently unable to connect to the server at all.

Key details:
- The server may be hosted locally or on a cloud service (not sure).
- There have been recent changes to the server configuration.

Ideal skills and experience:
- Expertise in server management and game connectivity
- Experience troubleshooting connection issues
- Familiarity with both local and cloud-hosted servers
- Ability to analyze and rectify configuration changes

Please provide a detailed approach to how you would tackle this problem.