VS 2017 RC2 - Issues with updating packages

Win 10 / VS 2017 RC2 / SQL 2016 Dev - Literally a newly built PC with no other software installed.

2 Issues:

1. After updating all of the nuget packages to reference ASP.NET Core V 1.1.  When I ran the standard MVC Template Web App, Chrome starts up as expected then immediately closes and the application terminates (worked fine before updating all nuget).  I found that if I downgraded just the Microsoft.NETCore.App package back to V 1.0.1, this cured the issue.  Are others experiencing this?
2. Same basic MVC template App.  Trying to update the Bower packages (e.g. jQuery to V 3.1.1) or installing another package (e.g. font-awesome), results in an error similar to: ECMDERR Failed to execute "git ls-remote --tags --heads https://github.com/jquery/jquery-dist.git", exit code of #128

Can anyone help?

Thanks Rob.