Module not found: Error: Can't resolve '@nativescript/core/utils'

[nmandyam]

Make sure to check the demo app(s) for sample usage

Make sure to check the existing issues in this repository

If the demo apps cannot help and there is no issue for your problem, tell us about it

Added the plugin to my existing, running app. Can't compile now, thanks to this error. There's probably a simple fix, not able to figure this out.
I don't see @nativescript/core/utils as a supported module at all.

Please, provide the following version numbers that your issue occurs with:

• CLI: 8.2.3
• Cross-platform modules: 6.5.27
• Runtime(s): iOS 6.5.5
• Plugin(s):
  "@nativescript/core": "^8.2.3",
  "@nstudio/nativescript-cardview": "^1.0.0",
  "@nstudio/nativescript-checkbox": "^1.0.0",
  "@proplugins/nativescript-dom": "^2.2.3",
  "@proplugins/nativescript-platform-css": "^2.0.0",
  "cheerio": "^1.0.0-rc.3",
  "child_process": "^1.0.2",
  "cookie": "^0.3.1",
  "crypto-js": "^3.1.9-1",
  "deepmerge-json": "^1.3.2",
  "delay": "^4.3.0",
  "email-validator": "^2.0.4",
  "html-entities": "^1.2.1",
  "https-proxy-agent": "^3.0.0",
  "hydra-page-previewer": "^0.2.1",
  "jsdom": "^15.1.1",
  "linkifyjs": "^2.1.8",
  "moment": "^2.14.1",
  "moment-timezone": "^0.5.25",
  "nativescript-animated-circle": "^1.2.0",
  "nativescript-apple-sign-in": "^2.0.0",
  "nativescript-background-http": "^4.2.1",
  "nativescript-camera": "^4.5.0",
  "nativescript-cfalert-dialog": "^1.0.15",
  "nativescript-clipboard": "^2.1.1",
  "nativescript-dev-webpack": "^1.5.1",
  "nativescript-drawingpad": "^3.1.0",
  "nativescript-drop-down": "^5.0.4",
  "nativescript-exit": "^1.0.1",
  "nativescript-fancyalert": "^3.0.9",
  "nativescript-geolocation": "^5.1.0",
  "nativescript-google-places-autocomplete": "^1.0.3",
  "nativescript-imagepicker": "^7.1.0",
  "nativescript-iqkeyboardmanager": "^1.5.1",
  "nativescript-local-notifications": "^4.2.0",
  "nativescript-mediafilepicker": "^4.0.2",
  "nativescript-menu": "^1.1.3",
  "nativescript-modal-datetimepicker": "^1.2.2",
  "nativescript-multi-select": "^1.0.6",
  "nativescript-plugin-firebase": "^10.5.2",
  "nativescript-popup": "^1.5.0",
  "nativescript-social-share": "^1.6.0",
  "nativescript-statusbar": "^5.0.0",
  "nativescript-timedatepicker": "^1.2.1",
  "nativescript-toasts": "^1.0.3",
  "nativescript-ui-calendar": "^6.0.0",
  "nativescript-ui-chart": "^7.1.1",
  "nativescript-ui-listview": "^8.0.1",
  "nativescript-ui-sidedrawer": "^8.0.0",
  "nativescript-urlhandler": "^1.3.0",
  "nativescript-videorecorder-x": "^1.0.3-android-x",
  "net": "^1.0.2",
  "node-html-parser": "^1.1.16",
  "node-schedule": "^1.3.2",
  "promise-map-series": "^0.2.3",
  "tls": "0.0.1",
  "tns-core-modules": "^6.5.4"
  "babel-traverse": "6.13.0",
  "babel-types": "6.13.0",
  "babylon": "6.9.0",
  "gulp": "^4.0.2",
  "gulp-jshint": "^2.1.0",
  "jshint": "^2.11.0-rc1",
  "lazy": "1.0.11",
  "tns-android": "6.2.0",
  "tns-ios": "6.5.5"

Please, tell us how to recreate the issue in as much detail as possible.

Add the plugin to the project, try debug or run.

Is there any code involved?

Not yet.

[nmandyam]

I managed to get past that problem by downgrading nativescript and webpack. Now, on a real device, I get this:
Apple Login failed: TypeError: undefined is not an object (evaluating '_nativescript_core__WEBPACK_IMPORTED_MODULE_0__["iOSNativeHelper"].collections')
Anyone seen this before?