Unable to save contact due to Class not found error

Installed version of Ionic Native Contacts plugin:

  • “cordova-plugin-contacts”: “^3.0.0”
  • @ionic-native/contacts”: “^4.4.2”

While trying to save a contact with name, email and phone number, the call to save() fails with following message:

error: ContactError {
  code:"Class not found"
}

Unable to figure out whats wrong here.