Warning: DOMXPath::query(): Invalid expression in /home/magento/public_html/vendor/magento/framework/Config/Dom.php on line 336

Warning: Attempt to read property "length" on bool in /home/magento/public_html/vendor/magento/framework/Config/Dom.php on line 338

Warning: Attempt to read property "length" on bool in /home/magento/public_html/vendor/magento/framework/Config/Dom.php on line 345

Fatal error: Uncaught Error: Call to a member function appendChild() on null in /home/magento/public_html/vendor/magento/framework/Config/Dom.php:216 Stack trace: #0 /home/magento/public_html/vendor/magento/framework/Config/Dom.php(147): Magento\Framework\Config\Dom->_mergeNode() #1 /home/magento/public_html/vendor/magento/framework/Config/Reader/Filesystem.php(153): Magento\Framework\Config\Dom->merge() #2 /home/magento/public_html/vendor/magento/framework/Config/Reader/Filesystem.php(132): Magento\Framework\Config\Reader\Filesystem->_readFiles() #3 /home/magento/public_html/vendor/magento/framework/App/ObjectManager/ConfigLoader.php(76): Magento\Framework\Config\Reader\Filesystem->read() #4 /home/magento/public_html/vendor/magento/framework/App/ObjectManager/Environment/Developer.php(79): Magento\Framework\App\ObjectManager\ConfigLoader->load() #5 /home/magento/public_html/vendor/magento/framework/App/ObjectManagerFactory.php(191): Magento\Framework\App\ObjectManager\Environment\Developer->configureObjectManager() #6 /home/magento/public_html/vendor/magento/framework/App/Bootstrap.php(212): Magento\Framework\App\ObjectManagerFactory->create() #7 /home/magento/public_html/vendor/magento/framework/App/Bootstrap.php(127): Magento\Framework\App\Bootstrap->__construct() #8 /home/magento/public_html/pub/index.php(27): Magento\Framework\App\Bootstrap::create() #9 {main} thrown in /home/magento/public_html/vendor/magento/framework/Config/Dom.php on line 216