Большое спасибо за оказанную помощь в получении документа!
Благодарность за отличную работу.
Flamix Bitrix24 Integration: Upgrade your PHP version. Minimum version - 7.2+. Your PHP version 5.6.30! If you don't know how to upgrade PHP version, just ask in your hosting provider! If you can't upgrade - delete this plugin!