I just upgraded to MC21 a week ago and thought I might try remote control with my Samsung Galaxy Tab S tablet through Gizmo. Initially I downloaded the latest version of Gizmo on play store. I generated an Access Key and voila, I had my library show up on my tablet. I clicked around for a minute and then got a message on my computer that MC had stopped working. No problem, I restarted it and then I couldn't get the library showing up on my tablet. Tried "connect to a server" and I get a continuous "connecting..." loop with no library showing up. Tried generating a new access key and entered it in my tablet (gizmo) and still the same problem - continuous connecting. Tried testing connection to server and get some cryptic message about "this library server is not reachable from the internet, but you can still use it within your local network" and further stuff that is way beyond my technical prowess about configuring my router's port access.....
It seemed so simple initially and now I can't get access and yes my laptop (server's )internet connection is turned on. Any suggestions?