SSL Mixed Content Error Fix

I'm facing an urgent issue that requires expertise in web security and database connectivity. Since the introduction of an SSL certificate to my website, I am encountering a "blocked mixed content" error that is preventing the database from resolving as normal. Before this, the website remained unchanged for four years.

Here's what you need to know:

- SSL certificate recently added
- Database connection previously stable for years
- Error message: "blocked mixed content"
- Use of HTTP resources on the site confirmed

I am looking for someone with:

- Proficiency in HTTPS and SSL implementations
- Experience troubleshooting and resolving mixed content errors
- Knowledge of secure database connections
- Expertise in web development and server configuration

Ideal candidates will efficiently identify all insecure requests, update them to HTTPS, and ensure that the database connections are fully functional with the SSL configuration without compromising website functionality. Please provide your approach and timeline along with your bid.
Website adress Kuran4all.com