Issue from downloading s3 files

[ynyang1]

aws s3 cp s3://public-qubole/lambda/spark-lambda-149.zip s3://my-bucket
Fatal error: An error occurred (403)when calling the Headobject operation: Forbidden

when I tried this command, another error occured likes below:
aws s3ls s3: //public-qubole/lambda/spark-2.1.0-bin-spark-lambda-2.1.0.tgz
An calling the ListobjectsV2operation: Access Denied

Could you provide appropriate access for the users to access the neccesary files.
Thanks
Yang