(gcloud.app.deploy) Error Response: [13] Unexpected Error. ()

Question

I'm unable to deploy with the App Engine (Java Flexible) and receive only the information in the header, which is not very informative. I've tried to deploy the helloworld-servlet sample app (https://github.com/GoogleCloudPlatform/getting-started-java/tree/master/helloworld-servlet) using the tutorial just to really keep it simple but I still get the same fault.

Here is the laterm, failing, part of the log (with http-logging turned on):

    [INFO] GCLOUD: -- headers start --
    [INFO] GCLOUD: -content-encoding: gzip
    [INFO] GCLOUD: alt-svc: quic=":443"; ma=2592000; v="39,38,37,35"
    [INFO] GCLOUD: cache-control: private
    [INFO] GCLOUD: content-length: 588
    [INFO] GCLOUD: content-location: https://appengine.googleapis.com/v1/apps/ticksterimportexport/operations/921b89d2-7eaa-41a1-87d2-c4be496793a0?alt=json
   [INFO] GCLOUD: content-type: application/json; charset=UTF-8
   [INFO] GCLOUD: date: Wed, 06 Sep 2017 05:46:41 GMT
   [INFO] GCLOUD: server: ESF
   [INFO] GCLOUD: status: 200
   [INFO] GCLOUD: transfer-encoding: chunked
   [INFO] GCLOUD: vary: Origin, X-Origin, Referer
   [INFO] GCLOUD: x-content-type-options: nosniff
   [INFO] GCLOUD: x-frame-options: SAMEORIGIN
   [INFO] GCLOUD: x-xss-protection: 1; mode=block
   [INFO] GCLOUD: -- headers end --
   [INFO] GCLOUD: -- body start --
   [INFO] GCLOUD: {
   [INFO] GCLOUD:   "name": "apps/ticksterimportexport/operations/921b89d2-7eaa-41a1-87d2-c4be496793a0",
   [INFO] GCLOUD:   "metadata": {
   [INFO] GCLOUD:     "@type": "type.googleapis.com/google.appengine.v1.OperationMetadataV1",
   [INFO] GCLOUD:     "method": "google.appengine.v1.Versions.CreateVersion",
   [INFO] GCLOUD:     "insertTime": "2017-09-06T05:46:06.731Z",
   [INFO] GCLOUD:     "user": "[email protected]",
   [INFO] GCLOUD:     "target": "apps/ticksterimportexport/services/default/versions/20170906t064538",
   [INFO] GCLOUD:     "ephemeralMessage": "Deployment failed. Attempting to cleanup deployment artifacts."
   [INFO] GCLOUD:   },
   [INFO] GCLOUD:   "done": true,
   [INFO] GCLOUD:   "error": {
   [INFO] GCLOUD:     "code": 13,
   [INFO] GCLOUD:     "message": "Unexpected Error. ()"
   [INFO] GCLOUD:   }
   [INFO] GCLOUD: }
   [INFO] GCLOUD:
   [INFO] GCLOUD: -- body end --
   [INFO] GCLOUD: total round trip time (request+response): 0.177 secs
   [INFO] GCLOUD: ---- response end ----
   [INFO] GCLOUD: ----------------------
   [INFO] GCLOUD: failed.
   [INFO] GCLOUD: ERROR: (gcloud.app.deploy) Error Response: [13] Unexpected Error. ()

Seems like everything is going well until the point of service startup. If I look in my Control Panel under Container Registry I can see my container images but there are no deployed instances of the service and it is unreachable.

This is the link to my app: https://hello-world-project-179013.appspot.com

I would be very grateful for any input on this matter. Thanks in advance!