Wordpress instance is broken and showing an empty error:
The following errors can be observed in
PleskUtilException: '/usr/local/psa/admin/bin/wpmng' '--user=username' '--' '--path=/var/www/vhosts/example.com/httpdocs' 'core' 'info' '--format=json' '--check-updates=true' failed with code 255.
trace: #0 /usr/local/psa/admin/plib/Service/Agent/Transport/Local.php(60): Service_Agent_Transport_Local_Exec->process(0, Object(Service_Agent_Command_Exec), Object(Service_Agent_Transport_LocalTransaction))
INFO [panel] The WordPress installation data was reloaded.
There are plugins installed in wordpress and some scripts include
wp-load.php file, for example:
# grep wp-load.php /var/www/vhosts/example.com/httpdocs/wp-content/plugins/some_plugin/some_script.php
require_once ($location . '/wp-load.php');
# grep wp-config.php /var/www/vhosts/example.com/httpdocs/wp-content/plugins/some_plugin/some_script.php
require_once ($location . '/wp-config.php');
This is Plesk internal issue #PPPM-2237 , which has been fixed in latest Plesk microupdates.
Apply the latest Plesk microupdates .
Click Refresh on all affected Wordpress installations.