I also completed the Pirate Weekend challenge Friday night and also had the page freeze on me right after I completed challenge #3. I spent 9 gold bars for extra moves.
Worse yet - today it says I haven't completed ANY of the 3 challenges!!
Seems everyone in the same boat. The game has reappeared now but not going to play thus time. More frustrated with the non existent customer care. Technical issues happen but to ignore everyone's complaints/ concerns is poor. I have had no response