Unable the access Plesk after dist-upgrade: blank page is shown

Symptoms

• In an attempt to access the Plesk login page after the dist-upgrade, the blank page is shown.

• The following errors can be found in the browser developers console (F12):

  ReferenceError: Jsw is not defined

  ---

  Failed to load resource: the server responded with a status of 404 (Not Found)

Cause

There were some issues during the upgrade procedure – some Plesk packages are not installed from new repositories yet.

Resolution

1. Connect to the server via SSH.

2. Execute the command below to complete the upgrade procedure:

   # plesk installer update

3. In case the issue still persists, run the command again:

   # plesk installer update

4. If the previous command fails with the “Installation will not continue” message, run packages reconfiguration:

   # dpkg –configure -a