I ** trying to install Dropbox onto my new Mac with the 4 chip; it is already installed on my other Mac.

When I download the program, it gets to this point where it tells me to open login. When I click on it, I get:

taken to a site (it's their site) with a blank page and nothing happens. I've taken it off the Bitdefender list of sites to stop blocking. No change. Tried logging on with both Firefox and Safari. No change. I have had Bitdefender for several years and never had this issue.

Any ideas?

[Re-Titled by Moderator]

Original Title: Dropbox problems on new Mac Air