This is probably a connection issue; maybe you're seeing the message "Oops. This is taking longer than usual. Please try again."
To register an account, you need a good Wi-Fi or data connection.
Here are a couple things you can try:
- Toggle your connections off and on in your phone settings
- Force close the app and re-open it
- Move to a different Wi-Fi network like free Wi-Fi at a coffee shop or library
- Delete and reinstall the app