Unable to pull latest operator image from dockerhub, fails with manifest unknown

$docker pull couchbase/operator

Using default tag: latest

Error response from daemon: manifest for couchbase/operator:latest not found: manifest unknown: manifest unknown 

$docker pull couchbase/operator:latest 

Error response from daemon: manifest for couchbase/operator:latest not found: manifest unknown: manifest unknown

$docker pull couchbase/operator:2.7.0

2.7.0: Pulling from couchbase/operator

c06bde7f8db2: Pull complete 

5e3916d7a70d: Pull complete 

9d95ab3c694d: Pull complete 

e3686ee1b68a: Pull complete 

Digest: sha256:86e80c2e32641ca73da6c15a0bd21ad53d8c6d5b9c9f68d5db1de759b8ace22a

Status: Downloaded newer image for couchbase/operator:2.7.0

docker.io/couchbase/operator:2.7.0 

$docker pull couchbase/operator:2.6.4

2.6.4: Pulling from couchbase/operator

93d496a4ee8b: Pull complete 

32cf318c9a45: Pull complete 

90caa36d6f32: Pull complete 

f82cbc2ade8b: Pull complete 

Digest: sha256:1cb293255578c48dc4a0dcb720370e64c0bb624aa2aa8808c821569d8751d3d6

Status: Downloaded newer image for couchbase/operator:2.6.4

docker.io/couchbase/operator:2.6.4