Error in Plesk: SWKeyExFatalError error: Cannot open file

Symptoms

• When logging in to Plesk or browsing pages in Plesk, one of the following error messages appears:

  PLESK_INFO: Internal error:
  error: Cannot open file: /etc/sw/keys/info
  Message error: Cannot open file: /etc/sw/keys/info
  File functions.php
  Line 3374
  Type SWKeyExFatalError

  ---

  PLESK_INFO: ERROR: SWKeyExFatalError
  error: Cannot open file

  0: common_func.php3:4480
  of_get_key_by_product(string ‘plesk-unix’)
  1: common_func.php3:4480
  getPleskKey()
  2: common_func.php3:4559
  getKeyProp(string ‘demo’)
  3: auth.php3:48

  ---

  PLESK_INFO: ERROR: SWKeyExFatalError
  error: /etc/sw/keys/lock/repository: cannot create: Permission denied

  ---

  PLESK_INFO: ERR [1] Exception: Token validation failed: The license key ‘PLSK.XXXXXXX’ was not verified. Plesk will try to verify license key. Please wait for few minutes and try again. To manually run verification of license key click “Retrieve Keys” button in “License Management”.; ; The license key ‘PLSK.XXXXXXX’ was not verified. Plesk will try to verify license key. Please wait for few minutes and try again. To manually run verification of license key click “Retrieve Keys” button in “License Management”

  ---

  PLESK_INFO: Internal error:
  Repository is not opened
  Message Repository is not opened
  File functions.php
  Line 3374
  Type SWKeyExFatalError

• Plesk operates slow and the following errors appear in /var/log/plesk/panel.log:

  mkstemp failed: /etc/sw/keys/tokens/tokenXXXXXX: Permission denied

Cause

Permissions on the /etc/sw/keys directory are invalid.

Resolution

1. Connect to a Plesk server via SSH.

2. Set the correct permissions:

   # /usr/sbin/usermod -a -G swkey-data psaadm
   # chown -R root:swkey-data /etc/sw/keys/
   # chmod -R 660 /etc/sw/keys/*
   # chmod -R 644 /etc/sw/keys/info
   # find /etc/sw/keys -type d -exec chmod 2770 {} ;
   # chmod 4510 /etc/sw/keys/restart/*
   # chown -R psaadm:swkey-data /etc/sw/keys/registry.xml /etc/sw/keys/keys/* /etc/sw/keys/tokens*

3. Restart the Plesk services:

   # service sw_engine restart
   # service sw_cp_server restart

4. Log in to Plesk and click the Retrieve Key button to restore your Plesk license. If the operation fails, install your Plesk license by clicking Install Key.