There is nothing wrong since you will only get error messages when a fault is detected at the following lights:
- braking lights
- rear fog light
- number plate lights
When one of the other light bulbs stop working, there is no error message.
And there is nothing wrong with your bella. If a light bulb ends its life, the same light bulb on the other side of the car will normally stop working within a couple of weeks, since they share the same lifetime expectence in burning hours.
When a light bulb goes bad on my car I always replace both light bulbs