Fatal error: Uncaught Error: Call to a member function escapeHtml() on null in /home/fcsus/public_html/applications/ECC/Webkul/UspsEndiciaShipping/view/adminhtml/templates/order/packaging/popup_content.phtml:18 Stack trace: #0 {main} thrown in /home/fcsus/public_html/applications/ECC/Webkul/UspsEndiciaShipping/view/adminhtml/templates/order/packaging/popup_content.phtml on line 18