The answer is who knows when they will reopen it. It's hard to say what caused the issue in the first place I would think. They have been running the system for months now and that was the only time any issue of that type has been reported. It was unfortunate, but things happen. No injuries were caused by the incident.
Basically how the gondola system works, the gripper which grabs the cable that is running constantly is triggered by springs at the top of the gondola cab arm on the gondola itself. When the cab comes in to the station the structure of the the station compresses the springs which releases the gripper from the cable. Once the cab is loaded, the station is designed to release the spring and the gripper grabs the cable and takes off. The releasing and grabbing of the cable is the reason the cabs come in and leave quickly at those two points, as the cable is running at a constant speed.
The blue cab on the night of the incident for whatever reason got stuck in the station portion of the gondola and it's gripper never reached the cable portion of the system.
I'm no expert on these systems, but they are pretty basic in structure and the basic design has been around for well over 70 years. I'm in construction, so I work with engineers constantly and I have studied the system and how it works as I've been on ski lifts and gondola lifts all around the world my entire life.
Doppelmayr is still on the scene and will be based on their contract for quite sometime.
The issue occurred in the loading station. The speed of the cable has nothing to do with the loading stations as the cable is released or re-gripped by the cab as a result of the design of the station itself. For whatever reason the cab never reached the end of the loading station before becoming wedged. It's very visible in the pictures of the incident and the only reason they had to stop the cable was that they would only do damage to returning cars and have a pile up in that particular station.
Doppelmayr ski lift video: