The admin has given me the permission but I keep getting the error. Are we missing anything?
Uploads CSVs to Metabase
You'll need to ask your admin to enable this feature to get started. Then, you'll be able to upload CSV files and work with them just like any other data source.
Is it also possible to support it for Redshift? We have use cases for uploading CSV but we're using Redshift data warehouse, and unfortunately, this feature doesn't support it.