Unable to install a Plesk license or open the “Server Information” page: StatInfo->getActiveDomainsNumber() failed: devices number <= 0

Symptoms

• When opening the Server Information page at Tools & Settings, the page fails to load with:

  PLESK_ERROR: ERROR: PleskFatalException: StatInfo->getActiveDomainsNumber() failed: devices number <= 0
  Additionally, an exception has occurred while trying to report this error: PleskFatalException
  StatInfo->getProductVersion failed: devices number <= 0 (class.SystemStatisticsForm.php:123)

• Installation of a Plesk license fails with:

  PLESK_ERROR: ERR [panel] StatInfo->getProductVersion failed: devices number <= 0:
  0: /usr/local/psa/admin/plib/functions.php:76 getFullProductNameVersion()
  1: /usr/local/psa/admin/plib/Plesk/Title.php:27 Plesk_Title::get()
  2: /usr/local/psa/admin/plib/functions.php:363 go_to(string ‘/?start_page=%2Fplesk%2Flicense%2F’, string ‘top’)
  3: /usr/local/psa/admin/htdocs/server/key_upload.php:134
  ERR [1] StatInfo->getProductVersion failed: devices number <= 0

• One of the following error messages may appear in /var/log/plesk/panel.log:

  PHP Warning: Invalid argument supplied for foreach(); File: /usr/local/psa/admin/plib/ExtendedServerInfo.php, Line: 1718

  ---

  PHP Warning: A non-numeric value encountered; File: /usr/local/psa/admin/plib/StatInfo.php, Line: 406

• When checking disk usage information about partitions used by Plesk and other partitions, there is a device or filesystem that cannot be detected:

  # /usr/local/psa/admin/bin/sysinfo df-full
  sysinfo: ERROR: system call statfs: Bad address

  System error 14: Bad address
  sysinfo: ERROR: system call statfs: Bad address

  System error 14: Bad address
  Cannot detect device or filesystem for /usr/share/cagefs-skeleton/usr/local/psa/admin/plib/modules/wp-toolkit/vendor/plesk/plesk-migrator/backend/lib/python/parallels/core/extras/cacert

Cause

Resolution

Workaround

If update is not possible for some reason you may try the following