Improve the UI of the error screen

Ghost User
2018-01-24T20:48:02+01:00

Before:
![Screenshot_20171227-181046](/uploads/c0663e0383cd5785b708e88e7bae85c4/Screenshot_20171227-181046.jpg)

After:
![Screenshot_20171227-180955](/uploads/fae7b1182696b969ce3d48fb575755bf/Screenshot_20171227-180955.jpg)