Ionic and Native Bluetooth Serial Plugin

Hello!
I have with bluetooth serial plugin: https://ionicframework.com/docs/native/bluetooth-serial/

When I create a project like: ionic start App --type=“ionic-angular” - and add plugin i have error like:Object(…) is not a function
at BluetoothSerial.isEnabled

But when I create a project like: ionic start App - plugin works correctly.

What is the different? How can I solve problem with “object is not a function” in this case?

Please help!,

Marcin