Has anyone here used maven to publish pacts to pactflow?

Docs are here: https://github.com/pact-foundation/pact-jvm/tree/master/provider/maven#publishing-to-an-authenticated-pact-broker

Haven't used Pact CLI, but getting an odd error with maven. Execution default-cli of goal au.com.dius.pact.providermaven4.1.7:publish failed: Expected a HAL+JSON response from the pact broker, but got a response with no '_links'. URL: 'http://test-pactflow.pactflow.io', LINK: 'pb:publish-pact' -> [Help 1]