It looks like it closed 2 hours earlier. The client still thinks it is open, but points have been awarded and sharing does not work anymore. Or starting a new client does not see the puzzle as open.
I was just starting some point grabbing scripts, but now it seems too late for that.
The 2 hours difference made big differences for some players.
In that 2 hours, I increased my score substantially - I am credited with rank 79 in the puzzle, but went to (possible) rank 47:
Looking into this and will re-open it for 2 hours…
Here are more who were impacted:
reopened, scores reset, and investigating how this happened