Fatal error: Uncaught Error: Call to a member function escapeHtml() on null in /home/fastmicr/public_html/bg.livolo.bg/vendor/dotmailer/dotmailer-magento2-extension/view/adminhtml/templates/system/preview.phtml:5 Stack trace: #0 {main} thrown in /home/fastmicr/public_html/bg.livolo.bg/vendor/dotmailer/dotmailer-magento2-extension/view/adminhtml/templates/system/preview.phtml on line 5