title: TypeError: Cannot read property '_modulesNamespaceMap' of undefined in Vue
body: <p>I have a simple webapp created to practice my testing skills in vue using Vue Test Utils and Jest but come up with an error regarding with Vue. I'm just console logging to see if my AddDialog is in my Home file but have an error: This is my error:</p>
  <blockquote>
  <p>TypeError: Cannot read property '_modulesNamespaceMap' of undefined</p>
  </blockquote>
  <p>Here is my testing code.</p>
  <pre><code>// Imports
  import Home from '@/components/Home'
  // Utilities
  import {createLocalVue, mount,  } from '@vue/test-utils'
  import Vue from 'vue'
  import Vuetify from 'vuetify'
  import AddDialog from &quot;@/components/AddDialog&quot;;
  
  Vue.use(Vuetify)
  
  describe('Home.vue', () =&gt; {
  
      const localVue = createLocalVue()
      let vuetify
      beforeEach(() =&gt; {
          vuetify = new Vuetify()
      })
      test('creates a todo', async () =&gt; {
          const wrapper = mount(Home)
          console.log(wrapper)
      })
  })
  </code></pre>