I'm sorry to say tapatalk won't be functioning for a little while. The plugin decided to break after we moved to https (and still after we moved back to http). We're in the process of fixing the problem, been through a lot of the usual fixes but still nothing. Waiting to hear back from the tapatalk team. We'll keep you updated.
Edit: in the mean time you can simply use your mobile phone's web browser to login and post. Thanks for your patience!