Can replacing the clutch in an M5(if done poorly) result in a transmission leak?

What is your question?

Last summer I had the clutch replaced in my M5. A couple months later the car just refused to go into gear one day. When I towed it to service they said the transmission was nearly empty (~2 liters low) so the car automatically stopped to protect it. I am looking for an opinion as to whether replacing the clutch could be connected to the leak. Thanks very much.