Peugeot 407: warning light flickering without any reason

Dear all,

My Peugeot 407 keeps telling me, every time I touch the brake or my direction indicators, that the stopping lights and/or the direction indicators do not function. However, this is not the case: everything functions perfectly.

I suppose there is something wrong with the electronics in my car? Could someone help me with this? Thank you very much!

Kind regards,

Benjamin