Issue after upgrading to Ionic 4.1.1

Bug Report

Ionic version: [x] 4.1.1

Current behavior:

ERROR in node_modules/@ionic/angular/node_modules/@ionic/core/dist/types/components.d.ts(5526,13): error TS2320: Interface 'HTMLIonLoadingControllerElement' cannot simultaneously extend types 'IonLoadingController' and 'IonLoadingController'.
[ng]   Named property ''create'' of types 'IonLoadingController' and 'IonLoadingController' are not identical.
[ng] node_modules/@ionic/angular/node_modules/@ionic/core/dist/types/components.d.ts(5754,13): error TS2320: Interface 'HTMLIonSkeletonTextElement' cannot simultaneously extend types 'IonSkeletonText' and 'IonSkeletonText'.
[ng]   Named property ''width'' of types 'IonSkeletonText' and 'IonSkeletonText' are not identical.
[ng] node_modules/@ionic/core/dist/types/components.d.ts(5076,5): error TS2717: Subsequent property declarations must have the same type.  Property ''IonCheckbox'' must be of type 'IonCheckbox', but here has type 'IonCheckbox'.
[ng] node_modules/@ionic/core/dist/types/components.d.ts(5100,5): error TS2717: Subsequent property declarations must have the same type.  Property ''IonLoadingController'' must be of type 'IonLoadingController', but here has type 'IonLoadingController'.
[ng] node_modules/@ionic/core/dist/types/components.d.ts(5137,5): error TS2717: Subsequent property declarations must have the same type.  Property ''IonSelect'' must be of type 'IonSelect', but here has type 'IonSelect'.
[ng] node_modules/@ionic/core/dist/types/components.d.ts(5138,5): error TS2717: Subsequent property declarations must have the same type.  Property ''IonSkeletonText'' must be of type 'IonSkeletonText', but here has type 'IonSkeletonText'.
[ng] node_modules/@ionic/core/dist/types/components.d.ts(5176,5): error TS2717: Subsequent property declarations must have the same type.  Property ''ion-checkbox'' must be of type 'IonCheckboxAttributes', but here has type 'IonCheckboxAttributes'.
[ng] node_modules/@ionic/core/dist/types/components.d.ts(5237,5): error TS2717: Subsequent property declarations must have the same type.  Property ''ion-select'' must be of type 'IonSelectAttributes', but here has type 'IonSelectAttributes'.
[ng] node_modules/@ionic/core/dist/types/components.d.ts(5238,5): error TS2717: Subsequent property declarations must have the same type.  Property ''ion-skeleton-text'' must be of type 'IonSkeletonTextAttributes', but here has type 'IonSkeletonTextAttributes'.

Steps to reproduce: Updated my application using

npm install @ionic/angular@latest --save

Ionic info:

Ionic:

   ionic (Ionic CLI)             : 4.10.3 (/home/langstra/.nvm/versions/node/v11.5.0/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 4.1.1
   @angular-devkit/build-angular : 0.12.4
   @angular-devkit/schematics    : 7.3.5
   @angular/cli                  : 7.3.5
   @ionic/angular-toolkit        : 1.2.3

System:

   NodeJS : v11.5.0 (/home/langstra/.nvm/versions/node/v11.5.0/bin/node)
   npm    : 6.8.0
   OS     : Linux 4.15

[brandyscarney]

Thanks @coffeymatt! We just released version 1.0.2 of @ionic/pwa-elements to fix this, could you try updating and see if that fixes your problem?

Anyone else that is still running into this, please provide the output above by running npm ls @ionic/core --silent. Thanks!

[berchik]

I also encountered similar issues. To solve it delete package-lock.json and node_modules folder and run npm i. This should fix it. If not then repeat and also clean the cache.