It looks like you're using a Windows system, which is fine, but can cause issues.
The first, and easiest thing to try, is to un-tar the package file to your local computer. You'll see all the directories of JFBConnect contained within. Then, simply re-zip it by highlighting all the files and folders, right-clicking, and going to "Compress". That will create a new zip file for you. Try to install that.
If that doesn't work, let us know, and we'll help you further.
Thanks,
Alex