How to Solve the "An unhandled exception occurred: Schematic "page" not found in collection "@ngxs/schematics"" in ionic 4
//ionic angular-toolkit 설치 npm install @ionic/angular-toolkit
angular.json 의 cli 항목을 다음과 같이 변경
angular.json
... "cli": { "defaultCollection": "@ionic/angular-toolkit" }, ...