Version 5.1.0 has been released. Patch notes below (ET):
A new event will start on 12/6. Check out this link for more details!
Ascensions for Harley and Harley X have been added.
6★ Blackrose Harley
6★ Blackrose Harley X
You'll now be able to see how much stamina it costs to join a game when playing using the Online mode.