In your desperation to 'fly', you are leaving out all the info we need to help. I don't use Tower much, but have never seen that error. Slow down with your quedtions and someone here will help work through the issue. Have you EVER connected to the Sold app and flown successfully? Right now, I can't even be certain of that!its states connection fail. Bind failed. EADDRINUSE (address already in use). I don't know what could be using this address
If you explain what is really happening, don't use words like "it" without telling us what "it" is. If you tell us about applications and FW, don't say "latest" - tell us the exact versions. Also what specific mobile device and what OS.