If I add invoke Gradle to my configuration I get the following Error if I try to save the configuration:

Failed to parse form data. Please report this problem as a bug
JSON={"name":"project_name-android","description":"","":["","0"],"logrotate":true,"buildDiscarder":

{"stapler-class":"hudson.tasks.LogRotator","daysToKeepStr":"20","numToKeepStr":"20","artifactDaysToKeepStr":"","artifactNumToKeepStr":""}

,"properties":{"stapler-class-bag":"true","hudson-model-ParametersDefinitionProperty":{"parameterized":{"parameter":[

{"name":"GIT_REV","defaultValue":"origin/development","description":"","stapler-class":"hudson.model.StringParameterDefinition","kind":"hudson.model.StringParameterDefinition"}

,

{"name":"BUILD_DESCRIPTION","defaultValue":"This is a jenkins autobuild!","description":"","stapler-class":"hudson.model.StringParameterDefinition","kind":"hudson.model.StringParameterDefinition"}

,

{"name":"BUILD_TAGS","defaultValue":"internal","description":"","stapler-class":"hudson.model.StringParameterDefinition","kind":"hudson.model.StringParameterDefinition"}

]}},"hudson-plugins-throttleconcurrents-ThrottleJobProperty":{"throttleEnabled":false,"throttleOption":"project","maxConcurrentTotal":"1","maxConcurrentPerNode":"1","categories":"Android-Emulator"}},"displayNameOrNull":"","scm":{"value":"2","userRemoteConfigs":

{"url":"git@projects.git_server.net:project_name-android.git","name":"","refspec":""}

,"branches":{"name":"${GIT_REV}"},"includedRegions":"","excludedRegions":"","excludedUsers":"","localBranch":"","relativeTargetDir":"","reference":"","scmName":"","gitConfigName":"","gitConfigEmail":"","pruneBranches":false,"skipTag":false,"clean":false,"remotePoll":false,"disableSubmodules":false,"recursiveSubmodules":false,"authorOrCommitter":false,"wipeOutWorkspace":false,"ignoreNotifyCommit":false,"useShallowClone":false,"":["hudson.plugins.git.util.DefaultBuildChooser","auto"],"buildChooser":

{"stapler-class":"hudson.plugins.git.util.DefaultBuildChooser"}

,"gitTool":"Default"},"builder":[{"useWrapper":

{"value":"false","gradleName":"Gradle 1.8"}

,"description":"","switches":"","tasks":"assemble","rootBuildScriptDir":"","buildFile":"","useWorkspaceAsHome":false,"stapler-class":"hudson.plugins.gradle.Gradle","kind":"hudson.plugins.gradle.Gradle"},

{"targets":"","buildFile":"checkstyle-ant.xml","properties":"","antOpts":"","stapler-class":"hudson.tasks.Ant","kind":"hudson.tasks.Ant"}

,

{"command":"os_opts=\"-Djava.awt.headless=true\" lint --xml lint-results.xml .","stapler-class":"hudson.tasks.Shell","kind":"hudson.tasks.Shell"}

],"publisher":[

{"pattern":"","canRunOnFailed":false,"shouldDetectModules":false,"healthy":"","unHealthy":"","thresholdLimit":"low","unstableTotalAll":"","unstableTotalHigh":"","unstableTotalNormal":"","unstableTotalLow":"","failedTotalAll":"","failedTotalHigh":"","failedTotalNormal":"","failedTotalLow":"","defaultEncoding":"","stapler-class":"org.jenkinsci.plugins.android_lint.LintPublisher","kind":"org.jenkinsci.plugins.android_lint.LintPublisher"}

,

{"pattern":"","canRunOnFailed":false,"shouldDetectModules":false,"healthy":"","unHealthy":"","thresholdLimit":"low","unstableTotalAll":"","unstableTotalHigh":"","unstableTotalNormal":"","unstableTotalLow":"","failedTotalAll":"","failedTotalHigh":"","failedTotalNormal":"","failedTotalLow":"","defaultEncoding":"","stapler-class":"hudson.plugins.checkstyle.CheckStylePublisher","kind":"hudson.plugins.checkstyle.CheckStylePublisher"}

,

{"isCheckStyleActivated":true,"isDryActivated":false,"isWarningsActivated":true,"canRunOnFailed":false,"healthy":"","unHealthy":"","thresholdLimit":"low","unstableTotalAll":"","unstableTotalHigh":"","unstableTotalNormal":"","unstableTotalLow":"","failedTotalAll":"","failedTotalHigh":"","failedTotalNormal":"","failedTotalLow":"","defaultEncoding":"","stapler-class":"hudson.plugins.analysis.collector.AnalysisPublisher","kind":"hudson.plugins.analysis.collector.AnalysisPublisher"}

],"core:apply":""}

net.sf.json.JSONException: JSONObject["useWrapper"] is not a JSONObject.
at net.sf.json.JSONObject.getJSONObject(JSONObject.java:2006)
at hudson.plugins.gradle.Gradle$DescriptorImpl.newInstance(Gradle.java:339)
at hudson.plugins.gradle.Gradle$DescriptorImpl.newInstance(Gradle.java:284)
at hudson.model.Descriptor$1.instantiate(Descriptor.java:1046)
at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:665)
at org.kohsuke.stapler.RequestImpl.access$100(RequestImpl.java:81)
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:587)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:400)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:396)
at hudson.plugins.gradle.Gradle$DescriptorImpl.newInstance(Gradle.java:347)
at hudson.plugins.gradle.Gradle$DescriptorImpl.newInstance(Gradle.java:284)
at hudson.model.Descriptor.newInstancesFromHeteroList(Descriptor.java:916)
at hudson.model.Descriptor.newInstancesFromHeteroList(Descriptor.java:901)
at hudson.util.DescribableList.rebuildHetero(DescribableList.java:203)
at hudson.model.Project.submit(Project.java:207)
at hudson.model.Job.doConfigSubmit(Job.java:1136)
at hudson.model.AbstractProject.doConfigSubmit(AbstractProject.java:787)
at sun.reflect.GeneratedMethodAccessor513.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:297)
at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:160)
at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:95)
at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:120)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:727)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:841)
at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:248)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:727)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:841)
at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:248)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:727)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:841)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:630)
at org.kohsuke.stapler.Stapler.service(Stapler.java:224)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:686)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1494)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:96)
at hudson.plugins.greenballs.GreenBallFilter.doFilter(GreenBallFilter.java:58)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:99)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:88)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:46)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1474)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:370)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:960)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1021)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)