Symptoms
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In an attempt to access the Plesk login page after the dist-upgrade, the blank page is shown.
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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
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Connect to the server via SSH.
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Execute the command below to complete the upgrade procedure:
# plesk installer update
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In case the issue still persists, run the command again:
# plesk installer update
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If the previous command fails with the “Installation will not continue” message, run packages reconfiguration:
# dpkg –configure -a