Safari will not connect to any website

A few days ago I started having problems with Safari not connecting to any website. I have followed every known suggestion, clearing extensions, clearing history, restarting computer, even reinstalled the system, macOS Catalina version 10.15.7. Nothing seems to fix the problem. I'm now getting errors where I cannot connect to the App Store, even software updates says cannot connect because a secure connection to the server cannot be made. I have restarted my router and computer several times. All other devices can connect, iphone, ipad, and appleTV. I'm currently on my computer using Firefox with not connection problems. The problem must be with apple software but as stated I have already did and recovery and restalled the OS. I'm out of ideas any help would be greatly appreciated.