Incorrect value for field "params": cannot be empty. [conf.import.php:162 ? CApiWrapper->__call() ? CFrontendApiWrapper->callMethod() ? CApiWrapper->callMethod() ? CFrontendApiWrapper->callClientMethod() ? CLocalApiClient->callMethod() ? CConfiguration->import() ? CConfigurationImport->import() ? CConfigurationImport->processItems() ? CItem->update() ? CItemGeneral->checkInput() ? CItem->checkSpecificFields() ? CItemGeneral->validateItemPreprocessing() ? CApiService::exception() in include/classes/api/services/CItemGeneral.php:953]