harbor: Getting HTTP 404, "Manifest Unknown" when pushing an image to Harbor

I’m getting HTTP 404 “Manifest Unknown” error when pushing an image to a Harbor 2,0 registry

To reproduce, pull docker.elastic.co/elasticsearch/elasticsearch:7.9.3

$ docker pull docker.elastic.co/elasticsearch/elasticsearch:7.9.3
7.9.3: Pulling from elasticsearch/elasticsearch
f1feca467797: Pull complete
39d9d8875a6d: Pull complete
e7a6547bd7a1: Pull complete
a9cfa40c5418: Pull complete
0daf89d8c887: Pull complete
c84049f0f38a: Pull complete
9068e5a839f5: Pull complete
0d768056b087: Pull complete
0d190ac61a88: Pull complete
Digest: sha256:9116cf5563a6360ed204cd59eb89049d7e2ac9171645dccdb1421b55dbae888b
Status: Downloaded newer image for docker.elastic.co/elasticsearch/elasticsearch:7.9.3
docker.elastic.co/elasticsearch/elasticsearch:7.9.3

Tag it as a Harbor image

$ docker tag docker.elastic.co/elasticsearch/elasticsearch:7.9.3 harbor.xxx.yyy.com/money-burner/elasticsearch:1.2

Push it to Harbor registry:

$ docker push  harbor.xxx.yyy.com/money-burner/elasticsearch:1.2
The push refers to repository [harbor.xxx.yyy.com/money-burner/elasticsearch]
b67bd8865612: Pushed
1bbae5fb228e: Pushed
ffdc16fbe640: Pushed
a61b95f80b33: Pushed
748edfc60fb4: Pushed
29d63f7b4dd3: Pushed
f9fc8c4ea4ea: Pushed
c16e52a61918: Pushed
613be09ab3c0: Pushed
unknown: http status code: 404, body: {"errors":[{"code":"MANIFEST_UNKNOWN","message":"manifest unknown","detail":{"Name":"money-burner/elasticsearch","Revision":"sha256:b153829871d83cea307fcfdfb245c9981d8036847064ce89df645a49bcf8c1d9"}}]}

The image seems not corrupt as I was able to docker run:

$ docker run -it  docker.elastic.co/elasticsearch/elasticsearch:7.9.3 /bin/bash
[root@7c8c9b30f266 elasticsearch]# exit
exit

I was also able to do the following which seems to indicate that the image is not corrupted:

$ docker save docker.elastic.co/elasticsearch/elasticsearch:7.9.3 > /dev/null && echo 'OK' || echo 'Corrupted'
OK

The docker manifest inspect command gives me:

$  docker manifest inspect  docker.elastic.co/elasticsearch/elasticsearch:7.9.3
{
   "schemaVersion": 2,
   "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json",
   "manifests": [
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "size": 1727,
         "digest": "sha256:9ddcb04b7b2e6a18b6c57b055b9af44daeb841efa014c0215beb37ed5d270556",
         "platform": {
            "architecture": "amd64",
            "os": "linux"
         }
      },
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "size": 1727,
         "digest": "sha256:9f5648fb9a0c8f2672a3c0feb654927edd119dd81ccbf1b8bdcb614547d7fe9c",
         "platform": {
            "architecture": "arm64",
            "os": "linux"
         }
      }
   ]
}

Harbor core logs has following entries:

2021-05-17T15:07:32Z [DEBUG] [/server/middleware/log/log.go:30]: attach request id c87a8e8b-577d-44ef-8994-2fac76dea9b9 to the logger for the request HEAD /v2/money-burner/elasticsearch/blobs/sha256:8f58f7e426faeec7f759789d0841d26ff296fcfda8d64a72e51fc4af8f3e1aea
2021-05-17T15:07:32Z [DEBUG] [/server/middleware/log/log.go:30]: attach request id 21e656cb-8788-4432-95a8-02b948d78742 to the logger for the request HEAD /v2/money-burner/elasticsearch/blobs/sha256:70f1e3a1960ad99468199edd036fe3b559f10fe76fea90b83e0d853bad203eb0
021-05-17T15:07:32Z [DEBUG] [/server/middleware/artifactinfo/artifact_info.go:52]: In artifact info middleware, url: /v2/money-burner/elasticsearch/blobs/sha256:8f58f7e426faeec7f759789d0841d26ff296fcfda8d64a72e51fc4af8f3e1aea
2021-05-17T15:07:32Z [DEBUG] [/server/middleware/artifactinfo/artifact_info.go:52]: In artifact info middleware, url: /v2/money-burner/elasticsearch/blobs/sha256:70f1e3a1960ad99468199edd036fe3b559f10fe76fea90b83e0d853bad203eb0
021-05-17T15:07:32Z [DEBUG] [/server/middleware/log/log.go:30]: attach request id f32e3b06-ea1b-41d2-978a-ddfd72885e4c to the logger for the request HEAD /v2/money-burner/elasticsearch/blobs/sha256:817feb91b55c590cde52765064649bf5b6188541e13c499d977fe1a472893272
021-05-17T15:07:32Z [DEBUG] [/server/middleware/artifactinfo/artifact_info.go:52]: In artifact info middleware, url: /v2/money-burner/elasticsearch/blobs/sha256:817feb91b55c590cde52765064649bf5b6188541e13c499d977fe1a472893272
2021-05-17T15:07:32Z [DEBUG] [/server/middleware/log/log.go:30]: attach request id 6ff587cb-01bf-4cd3-a34a-64bbcfa79e5a to the logger for the request HEAD /v2/money-burner/elasticsearch/blobs/sha256:a19cf707b4fd6d2709e0690ad6d3f9cdfdc92c3f97ca4f193c934d76db03f99e
2021-05-17T15:07:32Z [DEBUG] [/server/middleware/artifactinfo/artifact_info.go:52]: In artifact info middleware, url: /v2/money-burner/elasticsearch/blobs/sha256:a19cf707b4fd6d2709e0690ad6d3f9cdfdc92c3f97ca4f193c934d76db03f99e
2021-05-17T15:07:33Z [DEBUG] [/server/middleware/log/log.go:30]: attach request id bd65cb9b-e441-4964-9393-3b5643d2bd55 to the logger for the request HEAD /v2/money-burner/elasticsearch/blobs/sha256:1ab13f928dc8aa958574d060fde595bd7715c1c2d3260446356a6a02d231e168
2021-05-17T15:07:33Z [DEBUG] [/server/middleware/artifactinfo/artifact_info.go:52]: In artifact info middleware, url: /v2/money-burner/elasticsearch/blobs/sha256:1ab13f928dc8aa958574d060fde595bd7715c1c2d3260446356a6a02d231e168
2021-05-17T15:07:33Z [DEBUG] [/server/middleware/log/log.go:30]: attach request id f25ea0bf-c3df-46af-936d-7d45f3cadcf9 to the logger for the request PUT /v2/money-burner/elasticsearch/manifests/1.2
2021-05-17T15:07:33Z [DEBUG] [/server/middleware/artifactinfo/artifact_info.go:52]: In artifact info middleware, url: /v2/money-burner/elasticsearch/manifests/1.2
2021-05-17T15:07:33Z [DEBUG] [/server/middleware/immutable/pushmf.go:51]: failed to list artifact, repository money-burner/elasticsearch not found
2021-05-17T15:07:33Z [DEBUG] [/lib/http/error.go:59]: {\"errors\":[{\"code\":\"NOT_FOUND\",\"message\":\"http status code: 404, body: {\\\"errors\\\":[{\\\"code\\\":\\\"MANIFEST_UNKNOWN\\\",\\\"message\\\":\\\"manifest unknown\\\",\\\"detail\\\":{\\\"Name\\\":\\\"money-burner/elasticsearch\\\",\\\"Revision\\\":\\\"sha256:b153829871d83cea307fcfdfb245c9981d8036847064ce89df645a49bcf8c1d9\\\"}}]}\\n\"}]