Deeplinks don't work on angular 8 / ionic 5.36

im’ on an angular v8.1 app, with ionic 5.36 and cordova/core 6.2

i need to install deeplinks then i use this doc : deeplinks v5

then i install

"@awesome-cordova-plugins/deeplinks": "^6.4.0"

cordova plugin is installed with ionic cordova plugin add ionic-plugin-deeplinks

when i launch with ionic serve, i have theses errors

[ng] ERROR in ./node_modules/@awesome-cordova-plugins/deeplinks/ngx/index.js 13:138-156
[ng] "export 'ɵɵFactoryTarget' (imported as 'i0') was not found in '@angular/core'
[ng] ERROR in ./node_modules/@awesome-cordova-plugins/deeplinks/ngx/index.js 26:0-27
[ng] "export 'ɵɵngDeclareClassMetadata' (imported as 'i0') was not found in '@angular/core'
[ng] ERROR in ./node_modules/@awesome-cordova-plugins/deeplinks/ngx/index.js 13:21-42
[ng] "export 'ɵɵngDeclareFactory' (imported as 'i0') was not found in '@angular/core'
[ng] ERROR in ./node_modules/@awesome-cordova-plugins/deeplinks/ngx/index.js 14:22-46
[ng] "export 'ɵɵngDeclareInjectable' (imported as 'i0') was not found in '@angular/core'

angular 8.1 is not compatible with this package?

if i use import { Deeplinks } from “@ionic-native/deeplinks/ngx”; then i have an error cordova_not_available

        .routeWithNavController(_this.navController, {
          "/external_connections": HomePage,
          "/reset_password": "reset_password",
          (match) => {
          (nomatch) => {

can’t upgrade angular/core, to many changes

how can use deeplinks with this setup?
thx for help