Uncaught TypeError: Object.getOwnPropertyNames called on non-object

[lcaprini]

Hi, I'm starting to use Vue and Vuex with typescript in a new project, but I need to support very old browser (Chrome >= 38), so I need to transpile into ES5.

I'm using VueJS 2.x because the new 3.x doesn't support transpiling to ES5 and all works fine, except for your package: during the initialization the app throws the error Uncaught TypeError: Object.getOwnPropertyNames called on non-object when executes addGettersToModule function. No errors on new browsers.

On https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getOwnPropertyNames I found the following:

In ES5, if the argument to this method is not an object (a primitive), then it will cause a TypeError. In ES2015, a non-object argument will be coerced to an object.

My files:

// config.state.ts
import { RPConfig } from './config.model';
export class ConfigState {
    public config: RPConfig | null = null;
}

// config.module.ts
import axios from 'axios';
import {
    Module,
    VuexModule,
    MutationAction,
    getModule
} from 'vuex-module-decorators';
import { RPConfig } from './models/config.model';
import { RPConfigDTO } from './models/config.dto';
import { ConfigState } from './models/config.state';
import store from '@/store';

@Module({ dynamic: true, name: 'config ', store })
class RPConfigModule extends VuexModule implements ConfigState {
    config: RPConfig | null = null;

    /**
     * Verifica se il configuratore è stato scaricato
     * @returns boolean
     */
    get configIsReady(): boolean {
        return this.config !== undefined;
    }

    /**
     * RItorna la base URL della CDN
     * @returns string
     */
    get cdnBaseUrl(): string {
        return this.config ? this.config.cdnBaseUrl : '';
    }

    @MutationAction
    update(payload: { configUrl: string }): Promise<{ config: RPConfig }> {
        const { configUrl } = payload;
        return new Promise((resolve, reject) => {
            axios.get<RPConfigDTO>(configUrl).then(
                (response) => {
                    resolve({
                        config: RPConfig.fromConfigDTO(response.data)
                    });
                },
                (err) => {
                    console.log(err);
                    setTimeout(() => {
                        this.update(payload).then(resolve, reject);
                    }, 5000);
                }
            );
        });
    }
}
export const RPConfigState = getModule(RPConfigModule);

// store.ts
import Vue from 'vue';
import Vuex from 'vuex';
import { ConfigState } from './config/models/config.state';

export interface RootState {
    config: ConfigState;
}
Vue.use(Vuex);
export default new Vuex.Store<RootState>({});

Could you help me to solve that issue?
Thanks?