The app does not work properly after having a reference preview error
Steps to Reproduce
- go to the article http://localhost:8080/#/article/be/%D0%9A%D0%B0%D1%86%D1%8F%D1%80%D1%8B%D0%BD%D0%B0_%D0%9C%D0%B5%D0%B4%D1%8B%D1%87%D1%8B
- go to next page
- select the reference 
User doesn't see the reference preview popup, and then unable to view article preview or even open the menu settings. It appears that the error breaks other functionality.
Nothing should happen because there was no reference found in the article.