I am having the difficulty of safari not working with the new download to IOS 15.1 on my iPhone 12 mini. I went to the safari advanced settings but cannot understand how or what it means to toggle of 4 to fix this. Please help solve the problem with safari and clarify the toggle of 4 on advanced safari settings.

Hello again, I am beyond frustrated. Please... does anyone really have a true fix for Safari since my new download of IOS 15.1 on my iPhone 12 mini. I tried every fix given here and it does not work. My Safari is not responding. I have been able to get my screen of favorites up but it's as though nothing, including Google, is connected to the internet. Just a blank screen with no movement toward downloading or an error message that says "my client has issued a malformed or illegal quest. That's all we know." What is that all about? Is there a way to revert to the previous IOS until they work out these kinks? I am frustrated and need answers. I don't know if I should toggle off experimental network loader or turn off private relay... or turn them on to maintain stability. HELP!