Go to File Manager.
Go to public_html
Create subdirectory error
Create new file 404.html.
Edit 404.html as you want it to appear.
Save.
Open .htaccess *
Add line:
Code:
ErrorDocument 404 /error/404.html
* If you do not see .htaccess, it is probably because you did not enable "hidden files".
Close FileManager.
Click " reset all interface settings " at bottom of cPanel
Open FileManager. You should get a Popup. Check "Show Hidden Files" and "Don't show this again"
You should see .htaccess. If not, create it.