When I search my question on this mendix forum , I found that this question has already asked 3 years ago. But time has changed Mendix Studio versions are also changed.So my question is that I have first installed mendix in my laptop window 10 (Mendix Studio Pro 8.0.0).I simply download the blank app template and run locally then this error occur . and this is my error details , Mendix.Modeler.M2EEConnector.M2EEException: The server encountered an error. at Mendix.Modeler.M2EEConnector.M2EEResponse.CheckSuccess() in C:\jenkins-ci\workspace\AppStudio3.0-Build@3\modeler\Mendix.Modeler.M2EEConnector\M2EEResponse.cs:line 57 at Mendix.Modeler.M2EEConnector.M2EEClient.CreateTcpJsonLogSubscriber(String name, LogLevel autoSubscribeLevel, String host, Int32 port) in C:\jenkins-ci\workspace\AppStudio3.0-Build@3\modeler\Mendix.Modeler.M2EEConnector\M2EEClient.cs:line 68 at Mendix.Modeler.M2EEConnector.TcpJsonLogSubscriber.SubscribeAndListen(LogLevel autoSubscribeLevel) in C:\jenkins-ci\workspace\AppStudio3.0-Build@3\modeler\Mendix.Modeler.M2EEConnector\TcpJsonLogSubscriber.cs:line 41 at Mendix.Modeler.M2EEConnector.RuntimeController.SubscribeToLogging(IM2EEClient zeeClient, LogLevel autoSubscribeLogLevel) in C:\jenkins-ci\workspace\AppStudio3.0-Build@3\modeler\Mendix.Modeler.M2EEConnector\RuntimeController.cs:line 166 at Mendix.Modeler.M2EEConnector.RuntimeController.Start(StartupInfo info, LogLevel autoSubscribeLogLevel) in C:\jenkins-ci\workspace\AppStudio3.0-Build@3\modeler\Mendix.Modeler.M2EEConnector\RuntimeController.cs:line 133 at Mendix.Modeler.Utility.BackgroundUtil.<>c__DisplayClass1_0`1.<Do>b__0(Object s, DoWorkEventArgs e) in C:\jenkins-ci\workspace\AppStudio3.0-Build@3\modeler\Mendix.Modeler.Utility\BackgroundUtil.cs:line 28 at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e) at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)
Seems the cause is an issue with ports on your machine being in use either by a mendix app, database or any other application. To find out if your ports are in use on windows open a cmd window and perform a netstat -a command.