Safari pages 404 error

Even though you had WebRoot installed previously, I think you should remove/disable the extension, to test. Also verify that any content blocker is shut off at Settings > Safari > Content Blocker, if you have that setting. After doing that I would restart. Also a review of the app in the App Store on Feb 3 states: "In the last few days Webroot's safari extensions started to auto-redirect valid web pages to some undefined link of the same domain...". That sounds familiar to what you are experiencing.

Is this just on one site that you are having this problem? The 404 error is common when the link to the site no longer points to the location where the page is. It is not a communication error as the site has received your request, but does not have the page to show you, or restricts access to the page, so it will show the 404 not found message.

Do you have a VPN installed?

Can you load this apple link: Apple

Apple suggest trying a different network, either WiFi or Cellular and also doing this:

Restart your device

Turn off your device and turn it on again.

• Restart your iPhone

Clear website data

You can clear website data occasionally to improve Safari performance.

1. Go to Settings > Safari.
2. Tap Clear History and Website Data.
3. Tap Clear History to confirm.

Turn on JavaScript

Turn on JavaScript if it's not already on.

1. Go to Settings > Safari > Advanced.
2. Turn on JavaScript.

If Safari isn't loading websites or quits on your iPhone, iPad, or iPod touch - Apple Support

Do you have a VPN installed?

Can you load this apple link: Apple

Do you have any Extensions at Settings > Safari > Extensions?

Does it happen only when connected to your WiFi router?

Try shutting off WiFi and see if you get the same results using Cellular Data.