How do I Edit PiTech template's 404 Error Page?

Hi,

I looked within SPPB for the error page so that I could edit the layout but didn't find a page to edit. Where/How do I edit said page. Joomshaper Answer Bot gave the following answer but the menu's 404 page is pointed at a URL; index.php?Itemid=404, but the 404 menu item is not published. Even though that item is not published, I do get an 404 Error Page when I manually pointed to a nonexistent page on the site so I do know that the 404 Error Page is functioning. I was able to change the original 404 image to a different 404 image from within PiTech's template style page but I would like to further customize the page.

To edit the 404 page, please follow the steps below:

     Login to your Joomla admin panel.
     Go to Menus > Main Menu > Error Pages.
     Click on the 404 page.
     Edit the page content.
     Save the changes.

Regards.