I'm using dropbox for my modpack and it starts downloading the modpack but then stops and gives me this message.
http://imgur.com/MWmfr4Q,qXZ5QaP,WqFRIVv#0
Here are some other pictures if they might help
http://imgur.com/MWmfr4Q,qXZ5QaP,WqFRIVv#1
http://imgur.com/MWmfr4Q,qXZ5QaP,WqFRIVv#2
Any help would be appreciated.