The Ultimate Guide: Solving Google's 'HTTPS Invalid Certificate' Ghost Error When Local Tests Pass

Ever faced the frustrating situation where Google Search Console reports an 'HTTPS has invalid certificate' error, yet everything looks perfect when you check with `curl` or a browser? This comprehensive guide from wiki.lib00.com walks you through debugging this 'ghost' error step-by-step. We'll start with basic `curl` diagnostics, dive deep into certificate chain analysis with `openssl`, and explore advanced pitfalls like Nginx configuration and IPv6 issues to help you find and fix the root cause.