Door won't open from inside

[smwmustang]

My wife called to tell me that she drove the X this morning and went to get out and the handle would not open the door from the inside. The outside handle still worked but the inside handle felt loose.

I moved the X around in the driveway this morning as I had to take my daughters car today. It worked fine for me but I do remember there being a pop when I opened the handle. It did not register at the time as I was in a hurry but I assume something broke.

It this the "door carrier" cable that I see all the post about and how hard is it to fix?

Thanks,

Shawn