Prestashop problem solving

I am looking for a Prestashop expert to help me solve a site performance issue within a week. I am open to suggestions for alternative solutions.

I updated my global php on my server and now my webshop is offline. I think because I used an older version of prestashop which is not compatible with the new php version.

I need somebody to help me get the webshop back online.

Requirements:
- Strong experience with Prestashop and troubleshooting site performance issues
- Knowledge of best practices for optimizing Prestashop websites
- Ability to identify and resolve performance bottlenecks
- Familiarity with server configuration and optimization
- Excellent problem-solving skills and attention to detail

Skills and experience:
- Proficiency in PHP, MySQL, and CSS
- Experience with caching mechanisms and CDN integration
- Familiarity with performance testing tools and techniques
- Previous experience with optimizing Prestashop websites and improving page load times

If you have the skills and experience necessary to tackle this project and can deliver results within a week, please submit your proposal.