`ionic state reset` fails with undefined value

I have an ionic v1 project but I’ve been experimenting with v2 so I have the latest beta ionic-cli installed, and I get the following error attempting to do ionic state reset:

$ ionic state reset --verbose
Task setting: title=state, name=state, summary=Saves or restores state of your Ionic Application using the package.json file, <COMMAND>=[ save | restore | clear | reset ], save=Save the platforms and plugins into package.json, restore=Restore the platforms and plugins from package.json, clear=Clear the package.json of cordovaPlugins and cordovaPlatforms, as well as clear out the platforms and plugins folders, reset=Clear out the platforms and plugins directories, and reinstall plugins and platforms, title=Only do operations with plugins, boolean=true, title=Only do operations with platforms, boolean=true, module=./ionic/state
Looking up Ionic root, cwd: /Users/ranger/rcs/opennms-compass
Ionic root directory:  /Users/ranger/rcs/opennms-compass
WARN: ionic.project has been renamed to ionic.config.json, please rename it.
WARN: ionic.project has been renamed to ionic.config.json, please rename it.
Removed platforms and plugins
State.restoreState /Users/ranger/rcs/opennms-compass platforms=true, plugins=true
Attempting to restore your Ionic application from package.json

Restoring Platforms

State.restorePlatforms /Users/ranger/rcs/opennms-compass name=OpenNMS, version=2.1.0, build=401, description=OpenNMS Compass, type=git, url=http://github.com/OpenNMS/opennms-compass.git, bower=*, commonmark=*, conventional-changelog-cli=^1.1.1, cordova-android=*, cordova-config-utils=^2.2.1, css-loader=^0.23.1, eslint=^1.10.3, eslint-friendly-formatter=^1.2.2, eslint-loader=^1.3.0, exports-loader=^0.6.3, expose-loader=^0.7.1, file-loader=^0.8.5, fs.extra=*, grunt-conventional-changelog=*, html-loader=^0.4.3, imports-loader=^0.6.5, jshint=*, jshint-stylish=*, libxmljs=^0.17.1, lodash=^4.10.0, lodash.padstart=^4.4.0, merge2=*, ng-annotate-webpack-plugin=^0.1.2, ngtemplate-loader=^1.3.1, node-sass=^3.4.2, phantomjs=^2.1.7, sass-loader=^3.2.0, script-loader=^0.6.1, shelljs=^0.6.0, style-loader=^0.13.0, url-loader=^0.5.7, webpack=^1.12.15, xcode=^0.8.4, xmldom=^0.1.22, xpath=0.0.22, cordovaPlugins=[ionic-plugin-keyboard, cordova-plugin-extension, cordova-plugin-console, cordova-plugin-datepicker, locator=https://github.com/apache/cordova-plugin-file, id=cordova-plugin-file, cordova-plugin-geolocation, locator=https://github.com/RangerRick/google-analytics-plugin, id=cordova-plugin-google-analytics, cordova-plugin-inappbrowser, cordova-plugin-network-information, cordova-plugin-splashscreen, cordova-plugin-statusbar, cordova-plugin-whitelist, locator=https://github.com/bez4pieci/Phonegap-Cookies-Plugin, id=com.bez4pieci.cookies, locator=https://github.com/RangerRick/cordova-certificate-plugin.git, id=com.raccoonfink.cordova.plugins.certificates, locator=https://github.com/OpenNMS/cordova-plugin-json-storage.git, id=cordova-plugin-json-storage, locator=https://github.com/RangerRick/cordova-HTTP.git, id=com.raccoonfink.cordova.plugins.http, cordova-plugin-screen-orientation, cordova-plugin-crosswalk-webview], cordovaPlatforms=[platform=android, version=5.1.1, locator=android, platform=ios, version=4.1.0, locator=ios], setup=bower install && npm install && ionic state reset, webpack=webpack --colors --display-error-details, webpack-release=webpack --colors --display-error-details --env=production, build=npm run webpack && ionic build, release-build=ionic prepare --release && npm run webpack-release && ionic build --release, changelog=conventional-changelog -p angular -i CHANGELOG.md -s -r 0 -u, prepare=npm run webpack && ionic prepare, increment=bin/update-build-number.js, release=npm run lint && npm run test && npm run release-build && bin/sign-android.sh, verbose-build=npm run lint && npm run test && webpack --debug --colors --display-modules --display-chunks --display-error-details --display-origins --display-reasons, genymotion=ionic run -slc android, android=ionic emulate -slc android, ios=ionic emulate -slc --address=localhost --target='iPhone-6s, 9.3' ios, device=ionic run --device -slc ios, watch=webpack --colors --display-error-details --watch, lint=eslint . --ext .js
cordova platform add android
cordova platform add ios

Restore platforms is complete

Restoring Plugins

State.restorePlugins /Users/ranger/rcs/opennms-compass name=OpenNMS, version=2.1.0, build=401, description=OpenNMS Compass, type=git, url=http://github.com/OpenNMS/opennms-compass.git, bower=*, commonmark=*, conventional-changelog-cli=^1.1.1, cordova-android=*, cordova-config-utils=^2.2.1, css-loader=^0.23.1, eslint=^1.10.3, eslint-friendly-formatter=^1.2.2, eslint-loader=^1.3.0, exports-loader=^0.6.3, expose-loader=^0.7.1, file-loader=^0.8.5, fs.extra=*, grunt-conventional-changelog=*, html-loader=^0.4.3, imports-loader=^0.6.5, jshint=*, jshint-stylish=*, libxmljs=^0.17.1, lodash=^4.10.0, lodash.padstart=^4.4.0, merge2=*, ng-annotate-webpack-plugin=^0.1.2, ngtemplate-loader=^1.3.1, node-sass=^3.4.2, phantomjs=^2.1.7, sass-loader=^3.2.0, script-loader=^0.6.1, shelljs=^0.6.0, style-loader=^0.13.0, url-loader=^0.5.7, webpack=^1.12.15, xcode=^0.8.4, xmldom=^0.1.22, xpath=0.0.22, cordovaPlugins=[ionic-plugin-keyboard, cordova-plugin-extension, cordova-plugin-console, cordova-plugin-datepicker, locator=https://github.com/apache/cordova-plugin-file, id=cordova-plugin-file, cordova-plugin-geolocation, locator=https://github.com/RangerRick/google-analytics-plugin, id=cordova-plugin-google-analytics, cordova-plugin-inappbrowser, cordova-plugin-network-information, cordova-plugin-splashscreen, cordova-plugin-statusbar, cordova-plugin-whitelist, locator=https://github.com/bez4pieci/Phonegap-Cookies-Plugin, id=com.bez4pieci.cookies, locator=https://github.com/RangerRick/cordova-certificate-plugin.git, id=com.raccoonfink.cordova.plugins.certificates, locator=https://github.com/OpenNMS/cordova-plugin-json-storage.git, id=cordova-plugin-json-storage, locator=https://github.com/RangerRick/cordova-HTTP.git, id=com.raccoonfink.cordova.plugins.http, cordova-plugin-screen-orientation, cordova-plugin-crosswalk-webview], cordovaPlatforms=[platform=android, version=5.1.1, locator=android, platform=ios, version=4.1.0, locator=ios], setup=bower install && npm install && ionic state reset, webpack=webpack --colors --display-error-details, webpack-release=webpack --colors --display-error-details --env=production, build=npm run webpack && ionic build, release-build=ionic prepare --release && npm run webpack-release && ionic build --release, changelog=conventional-changelog -p angular -i CHANGELOG.md -s -r 0 -u, prepare=npm run webpack && ionic prepare, increment=bin/update-build-number.js, release=npm run lint && npm run test && npm run release-build && bin/sign-android.sh, verbose-build=npm run lint && npm run test && webpack --debug --colors --display-modules --display-chunks --display-error-details --display-origins --display-reasons, genymotion=ionic run -slc android, android=ionic emulate -slc android, ios=ionic emulate -slc --address=localhost --target='iPhone-6s, 9.3' ios, device=ionic run --device -slc ios, watch=webpack --colors --display-error-details --watch, lint=eslint . --ext .js
cordova plugin add ionic-plugin-keyboard
Caught exception:
 undefined 

[nfroidure]

FYI we found out that this errors came from the fact there were no www folder when running ionic state reset.

[4F2E4A2E]

Thanks for using Ionic!

Thank you sir for providing Ionic!