when i run reindex command i am getting Argument 2 passed to Magento\Catalog\Block\Product\ImageFactory::getLabel()

[christoroy]

when i run reindex command bin/magento index:reindex catalog_data_exporter_categories i am getting this error in console.

Argument 2 passed to Magento\Catalog\Block\Product\ImageFactory::getLabel()

Category Feed index PHP TypeError: Argument 2 passed to Magento\Catalog\Block\Product\ImageFactory::getLabel() must be of the type string, null given, called in /var/www/html/airfield/vendor/magento/module-catalog/Block/Product/ImageFactory.php on line 168 in /var/www/html/airfield/vendor/magento/module-catalog/Block/Product/ImageFactory.php on line 117 PHP Stack trace: Magento\Catalog\Block\Product\ImageFactory\Interceptor->getLabel() /var/www/html/airfield/vendor/magento/module-catalog/Block/Product/ImageFactory.php:168 process unknown error: Unable to retrieve category data

I referred this LINK but i didn't got any solution.

Kindly guide me did anyone faced this issue.

Thanks in advance