["Waiting for region handshake..."]

I left the first section in Tutorial Island where they show you the controls, got stuck in a wall in the area afterwards, and tried to press the back button to get out, but the viewer either lost connection or crashed, and I can't log back in.

I get this message: "We're having trouble connecting. There may be a problem with your Internet connection or the Second Life Grid."

It happens after I get this message: "Waiting for region handshake..."

I tried teleporting home, "My last location", and a couple of the editor's picks, but none of them work.

Edit: I tried again after a day, and still the same thing happened.