Fatal error: Uncaught Error: Call to a member function getForm() on null in /home/fastmicr/public_html/bg.livolo.bg/vendor/magento/module-customer/view/adminhtml/templates/tab/newsletter.phtml:8 Stack trace: #0 {main} thrown in /home/fastmicr/public_html/bg.livolo.bg/vendor/magento/module-customer/view/adminhtml/templates/tab/newsletter.phtml on line 8