Plesk is inaccessible after installing updates: Unable to get administrator password: The system cannot find the file specified. (Error code 2)

Symptoms

• After installing Plesk updates, it is not possible to access Plesk.

• The following error is shown instead of login screen:

  CONFIG_TEXT: ERROR: Exception: Unable to get administrator password: The system cannot find the file specified. (Error code 2) at Unable to connect to pipe \\.\pipe\P_4755d610-937d-498b-a70f-6ee61941f472
  at (Con::ClientOverlappedPipe::create line 503)
  at getPassword('pwd')(PleskSrvClient::getPassword line 218)
  at (zif_get_admin_password line 277) (Helper.php:68)

• The following errors can be found in the C:\ParallelsInstaller\autoinstaller3.log :

  CONFIG_TEXT: MSI: Error! Error writing to file: C:\Program Files (x86)\Parallels\Plesk\admin\bin\reconfigurator.exe. Verify that you have access to that directory.
  MSI (01): Error writing to file: C:\Program Files (x86)\Parallels\Plesk\admin\bin\reconfigurator.exe. Verify that you have access to that directory.
  
  Failed to install 'C:\ParallelsInstaller\parallels\PANEL-WIN_17.5.3\dist-msi-Microsoft-2003-i386\plesk-service-node-utilities_mu021.msi': Fatal error during installation. (Error code 1603)
  Action '<install-msi-package command-line="REINSTALL=ALL REINSTALLMODE=vmscd ADDLOCAL=ALL ALLUSERS=1 ARPSYSTEMCOMPONENT=1 REBOOT=R AUTOINSTALLER=1" />' failed with error 1603(0x00000643)
  Error: The installation of the package 'plesk-service-node-utilities' failed with code 1603. (upgrade: Upgrading Plesk Utilities...)
  Not all packages were installed.
  Please contact product technical support.

Cause

Failed update of Plesk Utilities (plesk-service-node-utilities) package.

Resolution

1. Connect to the server using RDP .

2. Open Command Prompt and launch Plesk Installer in the interactive console mode:

   C:\> plesk installer --console

3. On the Main components list for Plesk screen make sure that Base packages of Plesk component is marked for update (with "*" sign) and proceed with the update.