Problem with 2003 BMW 325xi Driver's Side Door Handle

I have a problem with the driver's side door handle of my 2003 BMW

Here is how the problem started:

- I was unlocking my car from the outside with my automatic key by pushing the unlock button on my automatic key.

- At the same time that I was unlocking my car with the automatic key, I started to lift the exterior door handle on the driver's side of the car.

- As I lifted the exterior door handle at the same time that the interior lock was rising, something went amiss with the door handle, and I have no longer been able to open the driver's side door from the outside.

Here is how the problem is playing out:

- The driver's side door handle moves up and down (but much easier than before, as if nothing is being engaged by the door handle).

- I cannot open the driver's side door from the outside, not manually or otherwise, even when the door is unlocked.

- From the inside, everything works fine, and I can open the door normally.

Here are some questions:

- Is this an easy fix?

- Is it an expensive fix?

- Is it something that requires the door and window to be removed?

Thanks for any help you can give.

Augustus