Not a known element

[StefanWolf-tp]

I use the latest version of release 4 (installed via: npm i [email protected])

But i always get the error:

'lib-ionic-pullup' is not a known element:
1. If 'lib-ionic-pullup' is an Angular component, then verify that it is part of this module.
2. If 'lib-ionic-pullup' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("
  </ng-container>
</ion-content>

So i guess something is wrong with the module registration. But i double checked it and it seems to be right in my opinion:
in the app.module.ts i added the import:
import {IonicPullupModule} from 'ionic-pullup';

and then:

@NgModule({
     declarations: [ .... ],
     entryComponents: [ .... ],
     imports: [
     ....
     IonicPullupModule
  ],
  exports: [TranslateModule],
  providers: [ .... ] ,
  ....
})
export class AppModule {}

Can't use the latest version cause of angular 7 i guess? Cause i'm getting the following error:
ERROR in node_modules/ionic-pullup/lib/ionic-pullup.component.d.ts(80,9): error TS1086: An accessor cannot be declared in an ambient context.

I also tried to isntall the latest 3.0.1 Version and did some changes on the module (mainly only the imports for the ionic-angular.. (changed to @ionic/angular). Then the app build without errors but still getting the same issue but with the other component ion-pullup which was used in this version.

What i also checked was the ionic-pullup.metadata.json file. There is definitely a selector for the pullup component defined:
.... ,"arguments":[{"selector":"lib-ionic-pullup","changeDetect ....

I am using the pullup component only on one page where i also added the import of the footer state:
import { IonPullUpFooterState } from 'ionic-pullup';

so any idea what i can do to get it working?

also here my ionic info:

Ionic:

   Ionic CLI                     : 6.16.3 (C:\Users\xxxxxxxxxxxx\AppData\Roaming\npm\node_modules\@ionic\cli)
   Ionic Framework               : @ionic/angular 4.11.3
   @angular-devkit/build-angular : 0.13.9
   @angular-devkit/schematics    : 7.2.4
   @angular/cli                  : 7.3.9
   @ionic/angular-toolkit        : 1.4.1

Cordova:

   Cordova CLI       : 10.0.0
   Cordova Platforms : android 9.0.0
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 5.0.0, (and 29 other plugins)

Utility:

   cordova-res : not installed globally
   native-run  : 1.4.0

System:

   NodeJS : v14.17.3 (C:\Program Files\nodejs\node.exe)
   npm    : 6.14.13
   OS     : Windows 10

[StefanWolf-tp]

I guess i got it... did some more search and finally found this:
https://forum.ionicframework.com/t/ionic4-component-not-a-known-element/153169/11?u=b5518388

i added those also to the page like explained and the app now works and renders.

now im getting the error:

TypeError: Cannot read property 'clientHeight' of null
    at IonicPullupComponent.push../node_modules/ionic-pullup/fesm5/ionic-pullup.js.IonicPullupComponent.findIonicComponentsInPage (ionic-pullup.js:457)
    at ionic-pullup.js:209
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:423)
    at Object.onInvokeTask (core.js:17290)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:422)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:195)
    at push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask (zone.js:498)
    at ZoneTask.invoke (zone.js:487)
    at timer (zone.js:2281)

but i hope i can also figure that out