Safari shows 'Access Denied' on some websites

Hi I am getting Access Denied on some websites with Tahoe OS 26.2 using Safari. I have ensured that content blockers are not enabled and popups are allowed. Any extensions have been disabled. It is not the website that I am going to as I can access the website with Firefox. Additionally this problem occurred with the previous MacOS. I even tried disabling IP tracking, website cross tracking. What am I missing? Thanks