TypeError: Cannot read property 'style' of null

For some reason I end up with this error which is strange

Here is how I register the Toasts in the main,js file
```
/**
 * TOASTS
 */
// register the plugin on vue
import Toasted from 'vue-toasted';
Vue.use(Toasted);
```

Here is how I use it in my component

```
mounted() {

    this.$toasted.show('test', {class: "test"});
    this.fetchProjects();
  },
```