[Yandex Cloud documentation](../../../index.md) > [Yandex DataLens](../../index.md) > Troubleshooting > Failed to load description of table columns

# [Yandex DataLens] Failed to load description of table columns

`ERR.DS_API.COLUMN_SCHEMA_FAILED`

This error occurs when the table schema cannot be retrieved.


Make sure you can read the table schema using the standard methods for your source, and contact the Yandex Cloud [support](https://center.yandex.cloud/support). In your message, describe when the error occurs.