Unhandled Promise rejection: cordova-plugin-ionic not found

Getting this error, when I have applied the Ionic Deploy API in my project.
Unhandled Promise rejection: cordova-plugin-ionic not found. Are you sure you installed it? ; Zone: ; Task: setTimeout ; Value: cordova-plugin-ionic not found. Are you sure you installed it?
I have installed the plugin correctly through ionic deploy add… Can anybody help here please?