How to resolve the trouble "OSError: [Errno 13] Permission denied" after installed the AWS Add-on

[kavana]

I installed the AWS Addon and run the search below then occurred the "Permission denied" error.

Is there anyone can help me to resolve the trouble ASAP, Thank you!

[search conditon]
index="_internal" billing sourcetype=splunkd permission

[error]
11-15-2018 11:43:36.554 +0900 ERROR ExecProcessor - message from "python /middleware/splunk/etc/apps/Splunk_TA_aws/bin/aws_billing_cur.py" OSError: [Errno 13] Permission denied