Maybe I have done something when I changed the bulb?
Changing the bulbs did not resolve my issue and I doubt very much if you could damage it by simply swapping them out. Only thing to be mindful of is putting them back in the right way round.
After reading it don't even know where to start and how to fix it..
My advice would be to take it to a garage that has the ability to hook it up to a diagnostic computer and get a print out of the error code(s). In my case I believe it is the 'swivelling feedback sensor' which is faulty.
Another way (if you are feeling okay with a bit of DIY) is to remove both of the headlamp units out from the car and set them side by side on the bonnet still connected.
Then (with a friend to assist) switch the lights on and move the wheel to the left and right etc. On mine it became clear that the right-hand lamp was slow to rotate/the start-up process that the lights go through compared to the left side.
As these newer model headlights are fully enclosed units it means that I'll need to replace the entire assembly - which I will hopefully finally get around to doing at the end of the month.
Hope this helps and I'll update my post if the replacement unit solves my issues.