hudson.util.HudsonFailedToLoad: org.jvnet.hudson.reactor.ReactorException: java.io.IOException: Unable to read /var/lib/jenkins/config.xml
    at hudson.WebAppMain$3.run(WebAppMain.java:244)
Caused by: org.jvnet.hudson.reactor.ReactorException: java.io.IOException: Unable to read /var/lib/jenkins/config.xml
    at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:269)
    at jenkins.InitReactorRunner.run(InitReactorRunner.java:45)
    at jenkins.model.Jenkins.executeReactor(Jenkins.java:1010)
    at jenkins.model.Jenkins.<init>(Jenkins.java:878)
    at hudson.model.Hudson.<init>(Hudson.java:85)
    at hudson.model.Hudson.<init>(Hudson.java:81)
    at hudson.WebAppMain$3.run(WebAppMain.java:227)
Caused by: java.io.IOException: Unable to read /var/lib/jenkins/config.xml
    at hudson.XmlFile.unmarshal(XmlFile.java:165)
    at jenkins.model.Jenkins.loadConfig(Jenkins.java:2786)
    at jenkins.model.Jenkins.access$700(Jenkins.java:325)
    at jenkins.model.Jenkins$16.run(Jenkins.java:2804)
    at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
    at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282)
    at jenkins.model.Jenkins$7.runTask(Jenkins.java:999)
    at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:210)
    at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: com.thoughtworks.xstream.io.StreamException:  : only 1.0 is supported as <?xml version not '1.1' (position: START_DOCUMENT seen <?xml version=\'1.1\'... @1:19) 
    at com.thoughtworks.xstream.io.xml.XppReader.pullNextEvent(XppReader.java:124)
    at com.thoughtworks.xstream.io.xml.AbstractPullReader.readRealEvent(AbstractPullReader.java:148)
    at com.thoughtworks.xstream.io.xml.AbstractPullReader.readEvent(AbstractPullReader.java:141)
    at com.thoughtworks.xstream.io.xml.AbstractPullReader.move(AbstractPullReader.java:118)
    at com.thoughtworks.xstream.io.xml.AbstractPullReader.moveDown(AbstractPullReader.java:103)
    at com.thoughtworks.xstream.io.xml.XppReader.<init>(XppReader.java:63)
    at com.thoughtworks.xstream.io.xml.AbstractXppDriver.createReader(AbstractXppDriver.java:54)
    at com.thoughtworks.xstream.io.xml.AbstractXppDriver.createReader(AbstractXppDriver.java:65)
    at hudson.XmlFile.unmarshal(XmlFile.java:163)
    ... 11 more
Caused by: org.xmlpull.v1.XmlPullParserException: only 1.0 is supported as <?xml version not '1.1' (position: START_DOCUMENT seen <?xml version=\'1.1\'... @1:19) 
    at org.xmlpull.mxp1.MXParser.parseXmlDeclWithVersion(MXParser.java:2608)
    at org.xmlpull.mxp1.MXParser.parseXmlDecl(MXParser.java:2592)
    at org.xmlpull.mxp1.MXParser.parsePI(MXParser.java:2466)
    at org.xmlpull.mxp1.MXParser.parseProlog(MXParser.java:1447)
    at org.xmlpull.mxp1.MXParser.nextImpl(MXParser.java:1395)
    at org.xmlpull.mxp1.MXParser.next(MXParser.java:1093)
    at com.thoughtworks.xstream.io.xml.XppReader.pullNextEvent(XppReader.java:109)
    ... 19 more