@EstebanS0841 I would suggest making sure the VM is unlocked. If the screen is locked, then according to what I have read, that method does not work. That would make sense since a screenshot of a locked machine would be the lock screen which isn't likely what you are trying to capture anyway. You can use the RPA Service to login to your machine and a script like the one below to keep the screen from locking. This would not prevent the screen from locking if you were to connect and then disconnect though, but in normal unattended operation, your machine would always be unlocked.

    public sealed class Script     {         //https://stackoverflow.com/questions/49045701/prevent-screen-from-sleeping-with-c-sharp

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]         static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);

        [FlagsAttribute]         public enum EXECUTION_STATE : uint         {             ES_AWAYMODE_REQUIRED = 0x00000040,             ES_CONTINUOUS = 0x80000000,             ES_DISPLAY_REQUIRED = 0x00000002,             ES_SYSTEM_REQUIRED = 0x00000001             // Legacy flag, should not be used.             // ES_USER_PRESENT = 0x00000004         }

        public void PreventScreenSleep()         {             while(true)             // Prevent Idle-to-Sleep (monitor not affected) (see note above)             SetThreadExecutionState(EXECUTION_STATE.ES_DISPLAY_REQUIRED | EXECUTION_STATE.ES_CONTINUOUS);             System.Threading.Thread.Sleep(300000);         }     }