I recieve a 503 error when trying toget to the saml metadata page. I saw you had posted a fix for rhel, but wanted to know if there was also a fix on Ubuntu or a patch so I wouldn't have to reinstall the server?

 Failed startup of context o.e.j.w.WebAppContext@6acdbdf5{Shibboleth Identity Provider,/idp,file:///opt/jetty-9.4/temp/jetty-localhost-8086-idp_war-_idp-any-7814671892536454348.dir/webapp/,UNAVAILABLE}{/opt/gluu/jetty/idp/webapps/idp.war}
java.lang.UnsupportedClassVersionError: net/shibboleth/ext/spring/context/DelimiterAwareApplicationContext has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    at org.eclipse.jetty.webapp.WebAppClassLoader.foundClass(WebAppClassLoader.java:649)
    at org.eclipse.jetty.webapp.WebAppClassLoader.loadAsResource(WebAppClassLoader.java:622)
    at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:534)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at org.springframework.util.ClassUtils.forName(ClassUtils.java:282)
    at org.springframework.web.context.ContextLoader.determineContextClass(ContextLoader.java:352)
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:332)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:279)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103)
    at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:930)
    at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:553)
    at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:889)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:356)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1445)
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1409)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:822)
    at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:275)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:524)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:46)
    at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:188)
    at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:513)
    at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:154)
    at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:173)
    at org.eclipse.jetty.deploy.providers.WebAppProvider.fileAdded(WebAppProvider.java:441)
    at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:66)
    at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:784)
    at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:753)
    at org.eclipse.jetty.util.Scanner.scan(Scanner.java:641)
    at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:540)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:146)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:599)
    at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:249)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
    at org.eclipse.jetty.server.Server.start(Server.java:407)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)
    at org.eclipse.jetty.server.Server.doStart(Server.java:371)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at org.eclipse.jetty.xml.XmlConfiguration.lambda$main$0(XmlConfiguration.java:1888)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1837)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.eclipse.jetty.start.Main.invokeMain(Main.java:218)
    at org.eclipse.jetty.start.Main.start(Main.java:491)
    at org.eclipse.jetty.start.Main.main(Main.java:77)
2020-09-15 14:38:48.218:INFO:oejs.AbstractConnector:main: Started ServerConnector@7a1234bf{HTTP/1.1,[http/1.1]}{localhost:8086}
2020-09-15 14:38:48.219:INFO:oejs.Server:main: Started @7490ms
2020-09-15 14:47:40.886:INFO:oejs.AbstractConnector:Thread-1: Stopped ServerConnector@7a1234bf{HTTP/1.1,[http/1.1]}{localhost:8086}
2020-09-15 14:47:40.887:INFO:oejs.session:Thread-1: node0 Stopped scavenging
2020-09-15 14:47:40.900:INFO:oejsh.ContextHandler:Thread-1: Stopped o.e.j.w.WebAppContext@6acdbdf5{Shibboleth Identity Provider,/idp,null,UNAVAILABLE}{/opt/gluu/jetty/idp/webapps/idp.war}