Nginx SSL Certificate Troubleshooting Needed

My website is currently inaccessible due to issues with the SSL certificate I applied via zeroSSL. I need someone with expertise to troubleshoot the problem, as the SSL certificate is not being recognized.

Ideal Skills and Experience:
- Extensive knowledge of Nginx server configuration
- Proficiency in SSL certificate installation and troubleshooting
- Experience with zeroSSL and similar certificate providers
- Strong problem-solving skills and attention to detail