With the change in the forum software, we are no longer supporting Tapatalk. It's an app that has been plagued with issues for a long time, doesn't really allow people to make accounts to join us here (they're made on Tapa's side), and their image hosting has been problematic.
XterraNation looks great in a mobile browser and for those who miss the notifications of Tapa, we are still looking into how to support that.