Vue Selectors testers fail to grab Vue component

I'm using Testcafe Vue Selectors to test e2e in my Vue app, but it looks like I can't grab any of my components:

1) An error occurred in getVue code:

      TypeError: Cannot read property '__vue__' of undefined

      

        
        
        
      

    

This is a sample test I created:

import VueSelector from "testcafe-vue-selectors";
import { Selector } from 'testcafe';

fixture `Getting Started`
    .page `http://localhost:8081/`;

test('test totalValue format', async t => {
    const totalValue = VueSelector("total-value");

    await t
        .click("#total-value-toggle-format")
        .expect(totalValue.getVue(({ props }) => props.formatProperty)).eql(null)
});

      

        
        
        
      

    

The structure of my component tree is as follows:

Root
|___App
    |___Hello
        |___TotalValue

      

        
        
        
      

    

And I import the component like this:

  "total-value": TotalValue,

      

        
        
        
      

    

Why doesn't it work?

EDIT: this is the page where I am testing the component

<template>
    <div class="hello">
        <div class="component-wrapper">
              <total-value
                  :value="totalValueValue"
                  :formatProperty="computedFormatNumber">
              </total-value>
        </div>
    </div>
</template>

<script>   
import TotalValue from "../../core/TotalValue";

export default {
    name: "hello",
    components: {
        "total-value": TotalValue,
    },
    data() {
        return {
            totalValueValue: 1000000,
            formatNumber: true,
            formatFunction: Assets.formatNumber,
        };
    },
    computed: {
        computedFormatNumber() {
            return this.formatNumber ? ["nl", "0,0 a"] : [];
        },

    },
};