Joomla! Toolkit version 1.0.3 is installed.
While scanning for existing Joomla! instances (Find Joomla! Websites at Plesk > Joomla! Toolkit), the process fails with the following error message:
PLESK_ERROR: Cannot redeclare JConfig5a1368bbcf32f::$smtppass in /opt/psa/admin/plib/modules/joomla-toolkit/library/externals/JoomlaCli/src/Joomla/Console/Command/Site/Listing.php(217) : eval()'d code on line 86
This is a Joomla! Toolkit bug with ID EXTCERT-937 which is planned to be fixed in future product updates.
At the moment, there is no workaround.