@Rohit Kulkarni​  - From the error stack trace, This error specifically means it could not find any storage account keys and falls back to the default storage account keys.

could you please let us know if you are setting spark configs for ADLS gen2 at the cluster level or at the notebook level? If you are setting the spark configs at the notebook level. Kindly set it up at the cluster to make it available for metastore client.