Fatal error: Uncaught TypeError: Argument 1 passed to Varien_Simplexml_Config::setXml() must be an instance of Varien_Simplexml_Element, boolean given, called in /var/www/bambibaby.com/releases/20170622095801/app/code/community/Taxjar/SalesTax/Model/Observer/AdminMenuItems.php on line 27 and defined in /var/www/bambibaby.com/releases/20170622095801/lib/Varien/Simplexml/Config.php:133 Stack trace: #0 /var/www/bambibaby.com/releases/20170622095801/app/code/community/Taxjar/SalesTax/Model/Observer/AdminMenuItems.php(27): Varien_Simplexml_Config->setXml(false) #1 /var/www/bambibaby.com/releases/20170622095801/app/code/core/Mage/Core/Model/App.php(1339): TaxJar_SalesTax_Model_Observer_AdminMenuItems->execute(Object(Varien_Event_Observer)) #2 /var/www/bambibaby.com/releases/20170622095801/app/code/core/Mage/Core/Model/App.php(1318): Mage_Core_Model_App->_callObserverMethod(Object(TaxJar_SalesTax_Model_Observer_AdminMenuItems), 'execute', Object(Varien_Event_Observer)) #3 /var/www/bambibaby.com/releases/20170622095801/app/Mage.p in /var/www/bambibaby.com/releases/20170622095801/lib/Varien/Simplexml/Config.php on line 133