One team user experiencing issues building and running an app

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We have a user (with Scrum master) permissions, who is unable to build / run a specific branch of the app.   He has re-installed Mendix (10.22.0)  He has deleted his local working directory and re-cloned the app. He can't run the app, getting this error:   An unknown error occurred while starting the server.   Mendix.Modeler.RuntimeConnector.M2EEException: The server encountered an error.at Mendix.Modeler.RuntimeConnector.M2EEResponse.CheckSuccess() in Mendix.Modeler.RuntimeConnector\M2EEResponse.cs:line 57at Mendix.Modeler.RuntimeConnector.M2EEClient.ExecuteDdICommands(IFileSystem fileSystem, DdlCommands ddlCommands, String ddlCommandsLogDir) inMendix.Modeler.RuntimeConnector\M2EEClient.cs:line 284at Mendix.Modeler.RuntimeConnector.StartupManager.StartRuntime(IM2EEClient client, StartupInfo info, String deploymentld) in Mendix.Modeler.RuntimeConnector\StartupManager.cs:line 125at Mendix.Modeler.RuntimeConnector.StartupManager.PerformStartup(StartupInfo info, String deploymentld, IM2EEClient client) in Mendix.Modeler.RuntimeConnector\StartupManager.cs:line 67at Mendix.Modeler.RuntimeConnector.RuntimeController.Start(StartupInfo info, String deploymentld, LogLevel autoSubscribeLogLevel) in Mendix.Modeler.RuntimeConnector\RuntimeController.cs:line 146at Mendix.Modeler.Deployment.Local.LocalRunner .< >c_DisplayClass100_0 .< RuntimeLaunched>b_10 in Mendix.Modeler.Deployment\Local\LocalRunner.cs:line 459at Mendix.Modeler.Utility.BackgroundUtil .< >c_DisplayClass1_0'1 .< Do>b_0(Object s, DoWorkEventArgs e) in Mendix.Modeler.Utility\BackgroundUtil.cs:line 36at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)   At other times, he has seen this:   the index is locked; this might be due to a concurrent or crashed process   LibGit2Sharp.LockedFileException: the index is locked; this might be due to a concurrent or crashed processat LibGit2Sharp.Core.Ensure.HandleError(Int32 result) in /_/LibGit2Sharp/Core/Ensure.cs:line 155at LibGit2Sharp.Core.Ensure.ZeroResult(Int32 result) in /_/LibGit2Sharp/Core/Ensure.cs:line 173at LibGit2Sharp.Core.Proxy.git_index_write(IndexHandle index) in /_/LibGit2Sharp/Core/Proxy.cs:line 1169at LibGit2Sharp.Index.Write() in /_/LibGit2Sharp/Index.cs:line 309at LibGit2Sharp.Commands.Stage(IRepository repository, IEnumerable'1 paths, StageOptions stageOptions) in /_/LibGit2Sharp/Commands/Stage.cs:line 138at LibGit2Sharp.Commands.Stage(IRepository repository, String path) in /_/LibGit2Sharp/Commands/Stage.cs:line 25at Mendix.Modeler.VersionControl.Git.Services.Repository.LibGit2RepositoryProvider .< >c_DisplayClass32_0 .< Commit>b_0(Repository repo) inMendix.Modeler.VersionControl.Git\Services\Repository\LibGit2RepositoryProvider.cs:line 384   ANd this:    An error occurred while deploying.Could not load file or assembly 'System.Threading.Tasks.Parallel, Version=8.0.0.0, Culture=neutral,PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.   He has re-installed Mendix Studio Pro more than once   In general he is having a very unproductive experience. Anyone seen anything similar.    
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1 answers
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Hello Matt

Verify if other team members are able to run that specific branch. Is user is able to deploy and run another branch version?

Please ensure Java version matches 10.22.0 requirements.

 

The error suggests a communication issue between the modeler and runtime (M2EE) often related to environment configuration.

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