Resolved Plesk Onyx WHMCS 7 Scheduled Tasks Error

[Audanbal]

Task "/opt/plesk/php/7.0/bin/php -q /var/www/vhosts/domainname/crons/cron.php" completed with error in 0 seconds, output:

Unable to communicate with the WHMCS installation.

Please verify the path configured within the crons directory config.php file.

config.php
$whmcspath = '/var/www/vhosts/domainname/crons/';

configuration.php
$attachments_dir = '/var/www/vhosts/domainname/attachments/';
$downloads_dir = '/var/www/vhosts/domainname/downloads/';
$templates_compiledir = '/var/www/vhosts/domainname/templates_c/';
$crons_dir = '/var/www/vhosts/domainname/crons/';

 

[Audanbal]

Blind moment!
config.php
$whmcspath = '/var/www/vhosts/domainname/crons/';
Should be...
$whmcspath = '/var/www/vhosts/domainname/subdomainname/';