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

URI:/diamond/flexbox.xhtml;jsessionid=node0z0jlr3yi0voesi0f6xb5e2wp7858708.node0
STATUS:404
MESSAGE:/flexbox.xhtml Not Found in ExternalContext as a Resource
SERVLET:Faces Servlet

Powered by Jetty:// 9.4.36.v20210114