It just sheered off. The "key" part that fits in the lock came out in a few pieces.
The tire shop said this happens all the time, and they just put a wrench around the nut to take it off. But there's no space to do that with the wheels. They didn't mention the 2 pinned adapter idea... But even so, that's not going to be a permanent solution.
Fortunately, this happened on the second wheel to be removed (vs the last one). The first has been put back on, with only 4 of the 5 lug nuts holding it. Not good, but ok around town in the very short term. We've left messages for Tesla Support, but they really don't want to be contacted - they don't answer the phone, and the voice mailbox is full. I go online to chat, and that option gets grayed out when I click on it. Nothing after that.
I'm wondering if I just show up at the service department I might get some attention... It's 20 minutes away on the freeway.