How can I fix this error I got while re-installing dropbox?
The following packages have unmet dependencies: nautilus-dropbox : Depends: dropbox but it is not going to be installed E: Unable to correct problems, you have held broken packages.
I had a similar issue. I found the answer in the following post https://askubuntu.com/a/432485
Note the "sudo apt-get autoremove" which allows you to remove packages
sudo apt-get autoremove
so that you can do as follows to remove any broken packages.
sudo apt-get update sudo apt-get upgrade sudo apt-get remove dropbox sudo apt-get install dropbox