0:04:45.995 [ERROR] Error caught while performing an action on the server: 500 The call failed on the server; see server log for details
com.google.gwt.user.client.rpc.StatusCodeException: 500 The call failed on the server; see server log for details 	at com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java:209) 	at com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java:287) 	at com.google.gwt.http.client.RequestBuilder$1.onReadyStateChange(RequestBuilder.java:395) 	at sun.reflect.GeneratedMethodAccessor99.invoke(Unknown Source) 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 	at java.lang.reflect.Method.invoke(Method.java:597) 	at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) 	at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) 	at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:157) 	at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:326) 	at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:207) 	at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:129) 	at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561) 	at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:269) 	at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91) 	at com.google.gwt.core.client.impl.Impl.apply(Impl.java) 	at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:214) 	at sun.reflect.GeneratedMethodAccessor69.invoke(Unknown Source) 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 	at java.lang.reflect.Method.invoke(Method.java:597) 	at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103) 	at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71) 	at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:157) 	at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:281) 	at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:531) 	at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:352) 	at java.lang.Thread.run(Thread.java:619)