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org.zkoss.zk.device.DeviceNotFoundException: ajax not found. at org.zkoss.zk.ui.metainfo.LanguageDefinition.<init>(LanguageDefinition.java:344) at org.zkoss.zk.ui.metainfo.DefinitionLoaders.parseLang(DefinitionLoaders.java:275) at org.zkoss.zk.ui.metainfo.DefinitionLoaders.load0(DefinitionLoaders.java:177) at org.zkoss.zk.ui.metainfo.DefinitionLoaders.load(DefinitionLoaders.java:153) at org.zkoss.zk.ui.metainfo.LanguageDefinition.init(LanguageDefinition.java:315) at org.zkoss.zk.ui.metainfo.LanguageDefinition.getAll(LanguageDefinition.java:294) at org.zkoss.zk.ui.http.WebManager.getCWRURLPrefix(WebManager.java:268) at org.zkoss.zk.ui.http.WebManager.<init>(WebManager.java:225) at org.zkoss.zk.ui.http.HttpSessionListener23.contextInitialized(HttpSessionListener23.java:140) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4701) at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5204) at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5199) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722)