OCI CLI not working with Instance Principal Auth

[Chhatrapal215]

OCI_CLI_AUTH=instance_principal
[opc@cloudnenamingvm ~]$ oci os object list --bucket-name cloudnetnamingDND

/home/opc/lib/oracle-cli/lib64/python3.6/site-packages/oci/_vendor/httpsig_cffi/sign.py:10: CryptographyDeprecationWarning: Python 3.6 is no longer supported by the Python core team. Therefore, support for it is deprecated in cryptography. The next release of cryptography (40.0) will be the last to support Python 3.6.
from cryptography.hazmat.backends import default_backend # noqa: F401
ServiceError:
{
"client_version": "Oracle-PythonSDK/2.99.1, Oracle-PythonCLI/3.25.4",
"code": "BucketNotFound",
"logging_tips": "Please run the OCI CLI command using --debug flag to find more debug information.",
"message": "Either the bucket named 'cloudnetnamingDND' does not exist in the namespace 'axmbu1eyltbl' or you are not authorized to access it",
"opc-request-id": "phx-1:0oGfeV3SHeyjG8IZVI_1GycoUtg-VgWxY38n_peiSVdgUaMSTk8__D5aXqPiv3d8",
"operation_name": "list_objects",
"request_endpoint": "GET https://objectstorage.us-phoenix-1.oraclecloud.com/n/axmbu1eyltbl/b/cloudnetnamingDND/o",
"status": 404,
"target_service": "object_storage",
"timestamp": "2023-06-01T06:47:10.851532+00:00",
"troubleshooting_tips": "See [https://docs.oracle.com/iaas/Content/API/References/apierrors.htm] for more information about resolving this error. If you are unable to resolve this issue, run this CLI command with --debug option and contact Oracle support and provide them the full error message."
}

When I am using config file, it works fine. Group has the user and dynamic group has the OCID of my VM. Same policy statements are given for both, yet config file works but instance principal method doesn’t .
Can someone help in debugging?

[adizohar]

Please check below command

export OCI_CLI_AUTH=instance_principal
oci os object list --bucket-name cloudnetnamingDND
or
oci os object list --bucket-name cloudnetnamingDND --auth instance_principal