Error when accessing Plesk: Unable to get PSADb administrator password: The system cannot find the file specified

Symptoms

• The following error is displayed when trying to log in to Plesk:

  ERROR: Exception: Unable to get PSADb administrator password: All pipe instances are busy.
  (Error code 231) at Unable to connect to pipe
  .pipeP_289c0044-25b3-4eb5-a87a-8dbf63972b24<br> at (Con::ClientOverlappedPipe::create
  line 518)<br> at get shared instance of PleskSrvClient(PleskSrvClient::getInstance line
  364)<br> at (zif_get_psadb_admin_password line 250)

• The following error is displayed when trying to generate a one-time login link via CMD:

  C:> plesk login
  ERROR: Exception: Unable to get PSADb administrator password: The system cannot find the file specified. (Error code 2) at Unable to connect to pipe .pipeP_408485fc-63c3-4811-bd6c-cf11a1e3da4d
  at (Con::ClientOverlappedPipe::create line 503)
  at get shared instance of PleskSrvClient(PleskSrvClient::getInstance line 387)
  at (zif_get_psadb_admin_password line 251)

Cause

Broken Plesk files.

Resolution

1. Connect to the server via RDP.

2. Download the plesk-core.zip package from the Plesk repository http://autoinstall-win.plesk.com/pool/release/.

   Note: make sure to download the package for the appropriate Plesk version, including microupdates.

3. Create a temporary directory (for example, C:pleskmsi) and unpack the package to it.

4. Replace files in %plesk_dir%admin/plib with files from C:pleskmsiProgram FilesParallelsPleskadminplib.

5. Repair Plesk installation via Plesk Reconfigurator: Repair Plesk installation > Plesk services.

6. After that, repair Plesk accounts via Plesk Reconfigurator: Repair Plesk installation > Plesk server accounts.

7. Install the latest Plesk updates.