AdMobFree ionic v4 usage

Hi there,

I was trying to use AdMobFree in v4 and the v4 doc states the following import:

import { AdMobFree, AdMobFreeBannerConfig } from '@ionic-native/admob-free';

I was expecting to import @ionic-native/admob-free/ngx instead. Is it not the way in v4?
I cannot see ngx folder under admobfree so I ended up installing rxjs-compat

However, I get the following error:

index.js:177 Uncaught TypeError: Object(…) is not a function
at index.js:177
at Object…/node_modules/@ionic-native/admob-free/index.js (index.js:186)
at webpack_require (bootstrap:81)
at Object…/src/app/app.module.ts (app.component.ts:11)
at webpack_require (bootstrap:81)
at Object…/src/main.ts (environment.ts:15)
at webpack_require (bootstrap:81)
at Object.0 (main.ts:14)
at webpack_require (bootstrap:81)
at checkDeferredModules (bootstrap:43)

Could you please share your guidance?

Thanks,

Doug

npm install @ionic-native/admob-free@5.0.0-beta.15 --save

The above seems to work…

Now I get plugin_not_instaled error… I suppose admobfree is not ready for v4? Am I missing something obvious? Sorry, I am rather new to ionic…