Make sure your have that page open before the Join Accept is sent. It might also go out through another gateway, if the Join Request was received by multiple gateways. See screenshots in Things Uno not joining anymore - #5 by arjanvanb.
Make sure your have that page open before the Join Accept is sent. It might also go out through another gateway, if the Join Request was received by multiple gateways. See screenshots in Things Uno not joining anymore - #5 by arjanvanb.