I very recently upgraded from CiviCRM 5.6.1 to 5.10.4 and WordPress 4.9.9 to 5.1. Since then I get the following Cron error.
Failed loading /usr/local/ioncube/ioncube_loader_lin_7.2.so: /usr/local/ioncube/ioncube_loader_lin_7.2.so: undefined symbol: zend_empty_string
In spite of the error, the CiviCRM scheduled jobs are executed successfully. What is going on? Should I be worried about this? It's annoying to get emails every half-hour about this error.
** Added 3-11-19
Here's my cron code. We use CiviHosting.
/usr/local/bin/php.cli /home/phoenix/www/www/wp-content/plugins/civicrm/civicrm/bin/cli.php -u username -p password -e Job -a execute