Erel,
I think it has something to do with this command: #CanInstallToExternalStorage: True
I was able to reproduce the error. My tablet does not have an SD card inserted. The code that I've been playing with had the "true" coded and I never noticed that until now. Don't know how that got in there. When I changed it to false I did over a dozen installs with no problems. As soon as I changed it back to True it failed and grayed out the Bridge buttons. (The buttons are grayed out except for the Stop, but the Bridge is still connected and allowing installs, however, if I press the Stop button it disconnects and won't allow a re-connect because the buttons are grayed out.) I also was getting a message, when I Opened the app after install, saying an SD card was not inserted and to check if a USB cable was connected. I ignored this message because I got it at other times, too, and thought it was just an informative message. I finally got suspicious and discovered the above command which when set to false seems to have fixed the problem. I'll know as I keep testing but right now it appears to be the "smoking gun".
-Chuck