The "User7ZipPath" parameter is not supported

I am getting this error a lot more lately.. It's another of those random things that sometimes does or not occur when doing an iOS build...

1>C:\Work\MCD\Mobile\packages\Xamarin.Build.Download.0.4.5\build\Xamarin.Build.Download.targets(55,4): error MSB4064: The "User7ZipPath" parameter is not supported by the "XamarinDownloadArchives" task. Verify the parameter exists on the task, and it is a settable public instance property.
1>C:\Work\MCD\Mobile\packages\Xamarin.Build.Download.0.4.5\build\Xamarin.Build.Download.targets(51,3): error MSB4063: The "XamarinDownloadArchives" task could not be initialized with its input parameters.

Suggestions on how to fix ?