Cant install openAlpr

I’m trying to add the OpenAlpr to my project, but im getting java errors, heres my ionic Info:

cli packages: (C:\Users\paulo\AppData\Roaming\npm\node_modules)

    @ionic/cli-utils  : 1.19.2
    ionic (Ionic CLI) : 3.20.0

global packages:

    cordova (Cordova CLI) : 8.1.2 (cordova-lib@8.1.1)

local packages:

    @ionic/app-scripts : 3.1.9
    Cordova Platforms  : android 7.1.4
    Ionic Framework    : ionic-angular 3.9.2

System:

    Node : v8.11.1
    npm  : 6.7.0
    OS   : Windows 10

Environment Variables:

    ANDROID_HOME : not set

Misc:

    backend : pro

If i import using the default package in app.module dont work

import { OpenALPR, OpenALPROptions, OpenALPRResult } from '@ionic-native/openalpr';
i’ve got the following error:

c808e2e8-2b17-4fad-80d4-fcf495e5d65e

but if i add ngx to the end of the import the error goes away but got a compile error

import { OpenALPR, OpenALPROptions, OpenALPRResult } from '@ionic-native/openalpr/ngx';

And the error:
error: package com.openalpr.jni does not exist import com.openalpr.jni.Alpr;