Fatal error: Uncaught TypeError: Argument 1 passed to Magento\Elasticsearch\Model\Adapter\FieldMapper\Product\AttributeProvider::getByAttributeCode() must be of the type string, null given, called in /home/496721.cloudwaysapps.com/qnmvhasvyt/public_html/vendor/magento/module-elasticsearch/SearchAdapter/Query/Builder/Sort.php on line 92 and defined in /home/496721.cloudwaysapps.com/qnmvhasvyt/public_html/vendor/magento/module-elasticsearch/Model/Adapter/FieldMapper/Product/AttributeProvider.php:72 Stack trace: #0 /home/496721.cloudwaysapps.com/qnmvhasvyt/public_html/vendor/magento/module-elasticsearch/SearchAdapter/Query/Builder/Sort.php(92): Magento\Elasticsearch\Model\Adapter\FieldMapper\Product\AttributeProvider->getByAttributeCode(NULL) #1 /home/496721.cloudwaysapps.com/qnmvhasvyt/public_html/vendor/magento/module-elasticsearch/SearchAdapter/Query/Builder.php(45): Magento\Elasticsearch\SearchAdapter\Query\Builder\Sort->getSort(Object(Magento\Framework\Search\Request)) #2 /home/496721.cloudwaysapps.com/qnmvhasvyt/public in /home/496721.cloudwaysapps.com/qnmvhasvyt/public_html/vendor/magento/module-elasticsearch/Model/Adapter/FieldMapper/Product/AttributeProvider.php on line 72