Hello,
Fatal error: Uncaught Error: Call to a member function getFirstName() on null in /home/production/public_html/app/design/frontend/Xigen/Bootstrap-windowchild/Magento_Theme/templates/html/dashboard.phtml:2 Stack trace: #0 /home/production/public_html/vendor/magento/framework/View/TemplateEngine/Php.php(59): include() #1 /home/production/public_html/vendor/magento/framework/View/Element/Template.php(271): Magento\Framework\View\TemplateEngine\Php->render(Object(Magento\Framework\View\Element\Template), '/home/productio...', Array) #2 /home/production/public_html/vendor/magento/framework/View/Element/Template.php(301): Magento\Framework\View\Element\Template->fetchView('/home/productio...') #3 /home/production/public_html/vendor/magento/framework/View/Element/AbstractBlock.php(1097): Magento\Framework\View\Element\Template->_toHtml() #4 /home/production/public_html/vendor/magento/framework/View/Element/AbstractBlock.php(1101): Magento\Framework\View\Element\AbstractBlock->Magento\Framework\View\Element\{closure}() #5 /home/p in /home/production/public_html/app/design/frontend/Xigen/Bootstrap-windowchild/Magento_Theme/templates/html/dashboard.phtml on line 2