Sudden error in Prestashop

Hello, if the debug mode is not enabled, BO is showing following error message: Attempted to load class "AdminLegacyLayoutControllerCore" from the global namespace. Did you forget a "use" statement? [Symfony\Component\Debug\Exception\ClassNotFoundException 0] If I enable debug, BO is accessible again, but new orders are showing no status (screenshot attached). Here are the steps that led to that error: 1. Yesterday no issues at all, today all combinations for all products were missing. And I haven't touched a single file, setting, etc ... 2. I cleared cache and tried to change PHP version to see if the issue persist 3. After changing PHP version I started to receive the "Attempted to load class...." error. I switched back to previous PHP version but the error message persists. Thank you.