Fails on OpenApi V3.0.2

[temecom]

I get a failure when trying to generate from a openapi.json with the following header:

{
"openapi": "3.0.2",
"info": {
"title": "Camunda BPM REST API",
"description": "OpenApi Spec for Camunda BPM REST API.",
"version": "7.13.0",
"license": {
"name": "Apache License 2.0",
"url": "http://www.apache.org/licenses/LICENSE-2.0.html"
}
}

Full file is here: https://app.camunda.com/nexus/repository/camunda-bpm/org/camunda/bpm/camunda-engine-rest-openapi/7.13.0/camunda-engine-rest-openapi-7.13.0.jar

Error:
csmith@Desktop-003:~/Development/temecom/ember-camunda$ ember openapi ../../camunda/openapi.json
DEPRECATION: ember-cli-babel 5.x has been deprecated. Please upgrade to at least ember-cli-babel 6.6. Version 5.2.8 located: ember-camunda -> ember-cli-openapi-generate -> ember-cli-babel
Generating models from ../../camunda/openapi.json
openapi at ../../camunda/openapi.json doesn't contain definitions.