Runtime Error Unexpected value 'Toast' imported by the module 'AppModule'. Please add a @NgModule annotation


#1

Runtime Error
Unexpected value ‘Toast’ imported by the module ‘AppModule’. Please add a @NgModule annotation.
How to fix error , thank you
Ionic Framework: 3.0.1
Ionic App Scripts: 1.3.0
Angular Core: 4.0.0
Angular Compiler CLI: 4.0.0
Node: 6.9.5