From the latest update on you might have seen this information on your screen (for a few seconds):
Here's a translation for it:
Haro Pro Tap Live is a service in Japan only.
Use outside of Japan will not be covered by the service of this application.
When it is found out [that you're using this app outside of Japan], it is issued to the target customer. The account will also be suspended from this service.
Please acknowledge it beforehand.
Yes, this means that your account might be closed because you're not playing from Japan. I'm not exactly sure why they would be doing this, maybe there's some legal stuff going on, but be prepared. From now on you won't be able to play the game with a non-Japanese ID anymore either. When done loading the game this error message pops up:
An error occurred during communication.
Please try again with good wifi location or connection.
While it's entirely possible that your wifi is indeed bad, the error is probably happening due to you not using a Japanese IP adress.
It's sad that this is happening, we all had fun with this game. Maybe they actually plan a worldwide release but I doubt there's enough players for it.
RIP, Hello! Pro Tap Live.