SSL certificate chain and how its verification works in the browser (when misconfigured in the server) but not with language libraries (Python or Node)?

This post explains how SSL certificate verification works and the role of Certificate Authorities in establishing trust. It explores the concept of certificate chains and how they are validated. The post also discusses the use of AIA (Authority Information Access) in SSL certificate verification for browsers and why language libraries like Python or Node.js do not handle AIA. Finally, it provides a solution for fixing certificate chain misconfigurations in a server.