Fatal error: Cannot redeclare isMobile() (previously declared in /var/www/adventistbookcenter/public_html/app/design/frontend/Hyva/Child/Magento_Theme/templates/html/header.phtml:28) in /var/www/adventistbookcenter/public_html/app/design/frontend/Hyva/Child/Magento_Theme/templates/html/header.phtml on line 28