How to run a simple botium test against watson

I am attempting to test botium against watson assistant following the wiki.

Running:

• MacOS High Sierra 10.13.06
• Node 8.10
• Npm 6.4.1

Step by step what I did:

• I installed botium-cli: npm i botium-cli -g
• Setup the following folder structure

Where this is my package.json:

{
  "name": "botium",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "emulator": "botium-cli emulator console --convos ./spec/convos --config ./botium.json",
    "emulatorBrowser": "botium-cli emulator browser --convos ./spec/convos --config ./botium.json"
  },
  "author": "",
  "license": "ISC"
}

And this is my botium.json:

{
    "botium": {
      "Capabilities": {
        "PROJECTNAME": "botium-sample1",
        "CONTAINERMODE": "watsonconversation",
        "WATSON_URL": "https://gateway-fra.watsonplatform.net/assistant/api",
        "WATSON_USER": "<WATSON_USER_ID>",
        "WATSON_PASSWORD": "<WATSON_PASSWORD",
        "WATSON_WORKSPACE_ID": "<WATSON_WORKSPACE_ID>"
      },
      "Sources": {},
      "Envs": {
        "NODE_TLS_REJECT_UNAUTHORIZED": 0
      }
    }
}

Expected behavior:

As I execute npm run emulator I would expect botium to send the utterances specified in spec/convos/captain.convo.txt to watson and compare this against the specified test.

Actual behavior:

Error: Loading Botium plugin failed
    at Validate.Validate.then (/Users/user/workspace/testing/botium/node_modules/botium-cli/node_modules/botium-core/src/containers/PluginConnectorContainer.js:56:15)
    at <anonymous>