Currently, it is not possible to start a subscription for pathfinder battle, as there is no option of which set to start by. Apparently, I’m not the only one having seen this issue, but it’s been a few days and this situation has perdured.
There is currently the starting option of Kingmaker. It is likely that Jungle of Despair not being an option a display error due to us not having begun shipping yet. It should appear again as soon as we start shipping. I asked our webstore team to take a look in case it is not though.