magento2: New Rellic Indexing error in Magento 2.3.0 CE

Preconditions (*)

1. Ubuntu 18.04 LTS, Nginx, PHP 7.2, Varnish, Redis, MySQL, Magento 2.3.0 CE 2.New Rellic Reporting connected, APM applications successfully created by Magento through the API.

Steps to reproduce (*)

1. Allow Magento to reindex data normally through cronjobs
2. Monitor exception.log & system.log

Expected result (*)

1. Successful reindexation without errors

Actual result (*)

1. From Magento system log: main.ERROR: Cron Job magento_newrelicreporting_cron has an error: Warning: Invalid argument supplied for foreach() in /var/www/html/magento/vendor/magento/module-configurable-product/Model/ResourceModel/Product/Type/Configurable/Product/Collection.php on line 82. Statistics: {"sum":0,"count":1,"realmem":0,"emalloc":0,"realmem_start":65273856,"emalloc_start":62755456} [] []

2. Fom Magento exception log: main.CRITICAL: Warning: Invalid argument supplied for foreach() in /var/www/html/magento/vendor/magento/module-configurable-product/Model/ResourceModel/Product/Type/Configurable/Product/Collection.php on line 82 {"exception":"[object] (Exception(code: 0): Warning: Invalid argument supplied for foreach() in /var/www/html/magento/vendor/magento/module-configurable-product/Model/ResourceModel/Product/Type/Configurable/Product/Collection.php on line 82 at /var/www/html/magento/vendor/magento/framework/App/ErrorHandler.php:61)"} []