Fatal error: Uncaught Magento\Framework\Exception\LocalizedException: More than one node matching the query: /config/preference in /var/www/clients/client4/web17/web/vendor/magento/framework/Config/Dom.php:276 Stack trace: #0 /var/www/clients/client4/web17/web/vendor/magento/framework/Config/Dom.php(162): Magento\Framework\Config\Dom->_getMatchedNode('/config/prefere...') #1 /var/www/clients/client4/web17/web/vendor/magento/framework/Config/Dom.php(197): Magento\Framework\Config\Dom->_mergeNode(Object(DOMElement), '/config') #2 /var/www/clients/client4/web17/web/vendor/magento/framework/Config/Dom.php(142): Magento\Framework\Config\Dom->_mergeNode(Object(DOMElement), '') #3 /var/www/clients/client4/web17/web/vendor/magento/framework/Config/Reader/Filesystem.php(148): Magento\Framework\Config\Dom->merge('<?xml version="...') #4 /var/www/clients/client4/web17/web/vendor/magento/framework/Config/Reader/Filesystem.php(127): Magento\Framework\Config\Reader\Filesystem->_readFiles(Object(Magento\Framework\Config\FileIterator)) # in /var/www/clients/client4/web17/web/vendor/magento/framework/Config/Dom.php on line 276