Safari won't load pages

Deselect Proxies, if selected.

    System Preference > Network > Advanced  > Proxies Tab

    Unlock the lock if you have to.

    Under "Select Protocol", uncheck any box if check marked.

    Click "OK" then  "Apply”.

Try setting up another admin user account to see if the same problem continues. Please post back on whether or not this worked. Also try the Safe Mode. Please post back on whether or not this worked.

Isolating an issue by using another user account 

Safe Mode - About

If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor.  Please use copy and paste as screen shots can be hard to read. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown. If the log won’t post, try posting it in Pastebin and provide a link in a reply        Pastebin

Etrecheck – System Information

Are you using a VPN, not VPN but network Firewall like service?

      Download EtreCheck: https://etrecheck.com/maspro  and post the report here.

      Click, “Free Download” button and then  “Click to download” button,

      open Downloads folder, click on it to open, and then select ”Open”.

      “Choose a problem” from the popup menu box, and then “Start EtreCheck” in the dialog.

      Click “Share Report” button in the toolbar and select “Copy report”.

      Click the “Page” button in the toolbar at the bottom of this page and paste it when you reply.

      Note: This is a diagnostic test.