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Fatal error: Uncaught Error: Call to undefined function has_rights() in /var/www/html/a2billing/addons/contrib/archives/enhancements/A2B_entity_package_group.php:40 Stack trace: #0 {main} thrown in /var/www/html/a2billing/addons/contrib/archives/enhancements/A2B_entity_package_group.php on line 40