HTTP ERROR 404 /flexbox.xhtml Not Found in ExternalContext as a Resource

URI:/diamond/flexbox.xhtml;jsessionid=node019ybx6fo7z105z0orva0qzinp6218465.node0
STATUS:404
MESSAGE:/flexbox.xhtml Not Found in ExternalContext as a Resource
SERVLET:Faces Servlet

Powered by Jetty:// 9.4.36.v20210114