Grafana Athena Data Source - UnrecognizedClientException

Currently I'm trying to get data source from Athena in AWS Grafana.

Under the section - Apps/AWS Data Sources/Data sources, I selected Service as 'Athena' and when i select the Regions as 'Asia Pacific(Sydney)', I get error "Warning There were some errors while fetching your AWS information. Take a look carefully, please. UnrecognizedClientException: The security token included in the request is invalid. status code: 400, request id: 275384bf-7c42-4aa9-a91e-a4dfed1123a0".

I set s3 bucket name as a. 'grafana-athena-query-results-storage'.

In the IAM under the Users, I have a permissions 'AmazonGrafanaAthenaAccess'.

So I believe I could be able to connect Data Source, but I can not get it.

I'm access AWS access portal through PowerUserAccess, and changed my /.aws/credentials of aws_access_key_id, aws_secret_access_key and aws_session_token as well and restarted my laptop.