d:I[59424,["216","static/chunks/216-59be749421ac3fd1.js","137","static/chunks/137-112bd8be2dcd0da3.js","145","static/chunks/145-a6edaad828ceeef1.js","830","static/chunks/app/kb/%5BcategorySlug%5D/page-db442097d0c92c4d.js"],"KBHeader"] e:I[80652,["216","static/chunks/216-59be749421ac3fd1.js","137","static/chunks/137-112bd8be2dcd0da3.js","145","static/chunks/145-a6edaad828ceeef1.js","830","static/chunks/app/kb/%5BcategorySlug%5D/page-db442097d0c92c4d.js"],"AjaxSearch"] f:I[72972,["216","static/chunks/216-59be749421ac3fd1.js","137","static/chunks/137-112bd8be2dcd0da3.js","145","static/chunks/145-a6edaad828ceeef1.js","830","static/chunks/app/kb/%5BcategorySlug%5D/page-db442097d0c92c4d.js"],""] 10:I[3141,["216","static/chunks/216-59be749421ac3fd1.js","137","static/chunks/137-112bd8be2dcd0da3.js","145","static/chunks/145-a6edaad828ceeef1.js","830","static/chunks/app/kb/%5BcategorySlug%5D/page-db442097d0c92c4d.js"],"InfiniteArticleList"] 11:T456,

Always remember that the Menus and pages in WordPress are separate entities.

Therefore if you delete a page it may still be in your site's main navigation creating a 404 not found error when someone clicks the link.

Here is how to remedy that.

In WordPress admin mouse over "appearance" on the left and select "menus" from the pop-out list.
On the right-hand side, you will see a list of bars that represent menu items on your main site.
Find the menu item you want to remove it will be the title of the page.
Click the small downward pointing arrow at the end of that menu item
Click The Remove link
Click "Save Menu" top right of the page.

Now go back to your site and you will see that the menu item is no longer there.

Job is done!

Working With Menus

I Deleted A Page But It Is Still Showing In The Navigation Of My Site Why?

Deleting Links From Your Navigation Menu