CTA with AWS

I am trying to setup a CTA VE environment to work with AWS S3.

The AWS login details work fine with S3 browser but in CTA, verify always fails with Error: S3 authentication failed: General error

I found this in the system.log

Nov 16 12:59:47 FileManagementDa(4178) [15-110-4-21]: (ERROR) CloudAdapter::SendAndParseHTTPResponse OID xyz-cta+cta_dummy_oid READ API VERSION operation failed
Nov 16 12:59:47 FileManagementDa(4178) [15-110-4-96]: (ERROR) CloudAdapter::GetApiVersion: OID xyz-cta+cta_dummy_oid failed to get bucket location.
Nov 16 12:59:47 FileManagementDa(4178) [15-109-4-1]: (INFO) Unable to create AmazonS3Adapter object bucketName=xyz-cta DNSName=s3-r-w.eu-central-1.amazonaws.com
Nov 16 12:59:47 FileManagementDa(4178) [15-109-4-95]: (WARNING) AmazonS3Adapter::private_attachSignature_v2: OID unable to get bucket name from OID, using currently configured bucket name
Nov 16 12:59:47 FileManagementDa(4178) [15-109-4-46]: (ERROR) AmazonS3Adapter::parseResponseError: AmazonS3 Bucket xyz-cta: HTTP status 400 : Bad Request
Nov 16 12:59:47 FileManagementDa(4178) [15-109-4-56]: (ERROR) AmazonS3Adapter::parseResponseError: AmazonS3 [Bucket xyz-cta] returned content error code 'InvalidRequest' message 'The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.'
Nov 16 12:59:47 FileManagementDa(4178) [15-109-4-50]: (ERROR) AmazonS3Adapter::parseResponseError: AmazonS3 Bucket xyz-cta: error: 400 Bad Request
Nov 16 12:59:47 FileManagementDa(4178) [15-110-4-21]: (ERROR) CloudAdapter::SendAndParseHTTPResponse OID CREATE operation failed
Nov 16 12:59:47 FileManagementDa(4178) [15-110-4-168]: (ERROR) CloudAdapter::CreateObjectTest: SendAndParseHTTPResponse failed
Nov 16 12:59:47 FileManagementDa(4178) [15-110-4-179]: (ERROR) CloudAdapter::VerifyConnection: Unable to create dummy object
Nov 16 12:59:47 FileManagementDa(4178) [15-39-4-35]: (INFO) Command fm AuthenticateAmazonS3 returned -1: AmazonS3 authentication failed: General error
Nov 16 12:59:50 FileManagementDa(4189) [15-42-4-84]: (INFO) Command received: AuthenticateAmazonS3 from user admin
Nov 16 12:59:51 FileManagementDa(4189) [15-110-4-21]: (ERROR) CloudAdapter::SendAndParseHTTPResponse OID xyz-cta+cta_dummy_oid READ API VERSION operation failed
Nov 16 12:59:51 FileManagementDa(4189) [15-110-4-96]: (ERROR) CloudAdapter::GetApiVersion: OID xyz-cta+cta_dummy_oid failed to get bucket location.
Nov 16 12:59:51 FileManagementDa(4189) [15-109-4-1]: (INFO) Unable to create AmazonS3Adapter object bucketName=xyz-cta DNSName=xyz-cta.s3.eu-central-1.amazonaws.com
Nov 16 12:59:51 LogDaemon(4178) [15-110-4-21]: (INFO) Message repeated 1 times since 12:59:47

Where in the appliance can I change the settings to AWS4-HMAC-SHA256?

Do I need to make any other changes to get it working with AWS?

Thank you