Error with Retrieve attachment (A042, FHIR R4)

Hi,

I am getting below error with A042 endpoint to download an attachement.

<?xml version="1.0" encoding="UTF-8"?>

InvalidArgumentOnly one auth mechanism allowed; only the X-Amz-Algorithm query parameter, Signature query string parameter or the Authorization header should be specifiedAuthorizationBearer hM18ZkAmUaH9ndgMKehmKoMTbzLm2TE850YR0YTC5TA3

I am adding only token in the header.

Any pointers what may be causing this would be a great help.

Thanks

Devendra