In case it helps anyone, in linux (ubuntu at least), “java --version” doesn’t work. You need “java -version”.
I’m running 7.5.7 and getting a 404 error as well. I can see /usr/local/bin/ignition/tomcat/webapps/ROOT/WEB-INF/web.xml and web.xml_clean, but have these other xml files been deprecated or are they located somewhere else in linux?