Unable to access Domains menu: Call to undefined method Plesk\Session\Context::getUser

Symptoms

• Unable to access Domains menu. The following error is shown in Plesk UI:

  PLESK_ERROR: Call to undefined method Plesk\Session\Context::getUser

• Unable to create subscription (Subscriptions > Add Subscription) and database (Domains > example.com > Databases > Add Database), the error below occurs:

  PLESK_ERROR: Zend_Form::isValid expects an array

Cause

plesk-core package is corrupted.

Resolution

1. Connect to the server via SSH.

2. Reinstall plesk-core package:

   # wget http://autoinstall.plesk.com/PSA_17.0.17/dist-deb-Ubuntu-16.04-x86_64/base/plesk-core_17.0.17-ubuntu16.04.build1700161028.14_amd64.deb
   # dpkg -i plesk-core_17.0.17-ubuntu16.04.build1700161028.14_amd64.deb

   Note: The example above is for Ubuntu 16.04 and Plesk Onyx 17.0. Please check for the latest version of package on https://autoinstall.plesk.com.

3. Install the latest microupdates:

   # plesk installer --select-release-current --reinstall-patch --upgrade-installed-components