The following error message is shown in Plesk when accessing Websites & Domains section:
APS Catalog error: Package with UID '3bee6a4a-84fc-4d6a-9d82-783d9c079a78' not found
The following error when you try to get package settings:
# /usr/local/psa/bin/aps --get-packages-global-settings
[2015-08-18 14:05:08] ERR [panel] Unable to get apsc.aps_registry_package row from psa.smb_apsPackage with ID = 2. Details: exception 'Exception' with message 'Package with UID 'c07a1a0e-1351-4705-a05f-ba3112a6a954' not found.' in /usr/share/aps_php/aps_php.php:12519
Go to Tools & Settings -> Application Vault and click "clear cache" button.
If the solution did not help, please check the following articles: