How to customize the Page Not Found (404) page
To customize the 404 error page served by Crowd, in order to better fit the design of your site.
Navigate to the following path on Crowd Server.
Add the following snippet at the bottom of the page, but before the </web-app> tag.
<error-page> <error-code>404</error-code> <location>/404.html</location> </error-page>
Create a new file
<crowd-install>/crowd-webapp/. We can use any HTML script like following to modify the custom page.
<!DOCTYPE html> <html> <body> <p>Modified 404 page</p> </body> </html>