I have tried Syncronize app directory Clean deployment directory change the server other than 8080 Error messsage: Mendix.Modeler.M2EEConnector.M2EEException: The server encountered an error. at Mendix.Modeler.M2EEConnector.M2EEResponse.CheckSuccess() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.M2EEConnector\M2EEResponse.cs:line 57 at Mendix.Modeler.M2EEConnector.M2EEClient.UpdateConfiguration(Dictionary`2 config) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.M2EEConnector\M2EEClient.cs:line 173 at Mendix.Modeler.M2EEConnector.StartupManager.PerformStartup(StartupInfo info, IM2EEClient client) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.M2EEConnector\StartupManager.cs:line 51 at Mendix.Modeler.M2EEConnector.RuntimeController.Start(StartupInfo info, LogLevel autoSubscribeLogLevel) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.M2EEConnector\RuntimeController.cs:line 135 at Mendix.Modeler.Deployment.Local.LocalRunner.<>c__DisplayClass70_1.<RuntimeLaunched>b__1() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Deployment\Local\LocalRunner.cs:line 336 at Mendix.Modeler.Utility.BackgroundUtil.<>c__DisplayClass1_0`1.<Do>b__0(Object s, DoWorkEventArgs e) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Utility\BackgroundUtil.cs:line 29 at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e) at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)