This Does Not Work!

THis evening, I was trying to set up the Buddypress plugin, and twice when I reviewed pages, I came on “Sorry, but the page you are looking for is not here” and NOT on either of the custom pages I made, which include an aplogy to the user and a request to let me know about the error. Nope, my custom pages did not work for me so how can I think they will work for website visitors?

https://www.ads-software.com/plugins/custom-error-pages/