This just happen to me but after collecting the reward about 20 times in a row it finally let me through 👍
Mine has sorted itself out recently! All this time I would occasionally go to Penny Pursuit and try again .Collected more than 1M coins in the process, and got there eventually. It appears to be linked to the "credit" one has in terms of percentage for fighting dr Z, as mine was showing some silly number before going awry. And the "unfreeze" did not happen after loading the game but after collecting the reward for umpteen thousandth time...
Good luck to everyone, there is hope. And thank you EA for your "great" support.
