M.App Enterprise

[Elvis]

Am getting this in Management logs...

System.InvalidOperationException: Cannot open M.App Service service on computer '.'.
   at System.ServiceProcess.ServiceController.GetServiceHandle(Int32 desiredAccess)
   at System.ServiceProcess.ServiceController.GenerateStatus()
   at System.ServiceProcess.ServiceController.get_Status()
   at MApp.Security.SyncContext.IsSyncServiceRunning()
   --- Inner exception ---
System.ComponentModel.Win32Exception: Access is denied

Warehouse username is displayed as .\warehouseuser under services. The user is a local user in the server where M.App Service is running.

[stefan.schuettenkopf]

Either 

1.) "warehouseuser" isn't allowed to start the services (Log on as a service right is missing for the user -> found at Administrative Tools -> Local Security Policies -> Local Policies -> User Rights Assignment) 

2.) his password is wrong

3.) Something went wrong during the installation / upgrade.

What is the Event Viewer stating?