Error with ionic resources --help

**Description:**

When entering "ionic resource --help" through the command line, at the project folder, the following error was found:
Error
at new Exception (/usr/local/lib/node_modules/ionic/node_modules/@ionic/cli-utils/lib/errors.js:8:23)
at new FatalException (/usr/local/lib/node_modules/ionic/node_modules/@ionic/cli-utils/lib/errors.js:17:9)
at /usr/local/lib/node_modules/ionic/node_modules/@ionic/cli-utils/lib/help.js:24:23
at Generator.next ()
at fulfilled (/usr/local/lib/node_modules/ionic/node_modules/tslib/tslib.js:100:62)
at name: 'Exception', exitCode: 1, fatal: true }

**Steps to Reproduce:**

Example repo:

1. cd into the project root folder
2. type "ionic resource --help"

**Output:**

Error
at new Exception (/usr/local/lib/node_modules/ionic/node_modules/@ionic/cli-utils/lib/errors.js:8:23)
at new FatalException (/usr/local/lib/node_modules/ionic/node_modules/@ionic/cli-utils/lib/errors.js:17:9)
at /usr/local/lib/node_modules/ionic/node_modules/@ionic/cli-utils/lib/help.js:24:23
at Generator.next ()
at fulfilled (/usr/local/lib/node_modules/ionic/node_modules/tslib/tslib.js:100:62)
at name: 'Exception', exitCode: 1, fatal: true }

**My `ionic info`:**

cli packages: (/usr/local/lib/node_modules)

@ionic/cli-utils : 1.18.0
ionic (Ionic CLI) : 3.18.0

global packages:

cordova (Cordova CLI) : 7.1.0
Gulp CLI : CLI version 3.9.1 Local version 3.9.1

local packages:

Cordova Platforms : android 6.3.0
Ionic Framework : ionic1 1.3.2

System:

Android SDK Tools : 26.0.2
Node : v8.9.1
npm : 5.5.1
OS : macOS Sierra
Xcode : Xcode 9.1 Build version 9B55

Environment Variables:

ANDROID_HOME : /Users/MaxLam/Library/Android/sdk

Misc:

backend : pro

**Other Information:**