Error while creating data asset Type-Oracle object storage

Summary: While creating data asset for type Oracle Object Storage, I am getting error as soon as i enter Tenancy OCID.

Either the Tenant with TenantID '<<Tenanct OCID>>' does not exist or you are not authorized to access it.

I am new to OCI and trying to learn as per Oracle documentation but due to above issue I am on hold from progressing on my learning path.

I have following policies added. what am i missing?

allow group to use object-family in compartment

allow any-user to read buckets in compartment where ALL {request.principal.type = 'disworkspace', request.principal.id = '', request.operation = 'GetBucket'}