redis problem php 8.1

I changed the php version from 7.4 to 8.1. I am using the latest version of cs-cart. The site is down and as I can see from the logs, the problem is resolved. What can I do? The admin panel is working, but the front end is not working.

Hi!

Please check the source code of the storefront page. It should contain additional information about the error, if there is one.