Ionic push notification not working (By youtube guid)

I tried to create ionic push notifications in my app by this tutorial:

and I got this errors:

[09:19:34] Finished ‘sass’ after 1.47 s
TypeScript error: app/app.ts(16,5): Error TS2322: Type ‘{ ‘core’: { ‘app_id’: string; ‘gcm_key’: string; }; }’ is not assignable to type ‘CloudSettings’.
Types of property ‘core’ are incompatible.
Type ‘{ ‘app_id’: string; ‘gcm_key’: string; }’ is not assignable to type ‘CoreSettings’.
Object literal may only specify known properties, and ‘‘gcm_key’’ does not exist in type ‘CoreSettings’.
TypeScript error: app/app.ts(38,27): Error TS2345: Argument of type ‘{ pluginConfig: { android: { senderID: string; }; }; }’ is not assignable to parameter of type ‘PushDependencies’.
Object literal may only specify known properties, and ‘pluginConfig’ does not exist in type ‘PushDependencies’.
[09:19:39] Finished ‘watch’ after 6.44 s
[09:19:39] Starting ‘serve:before’…
[09:19:39] Finished ‘serve:before’ after 9.4 μs

Does anyone have an idea what’s wrong? Does anyone have a guide that explains how to activate this plugin?