VS2015C Master Server Build Failed

I have Visual Studios 2015. just got the Master server sauce. Open MasterServer.sln in VS (even a Admin VS) and is says "One way Upgrade" VS is making changes to MAsterServer.sln (cant continue with out it). ok so make the changes

7 warning 2 messages for master server in the migration report 1 warning 2 messages for for solution " "

Building fails.

I havent a clue, what i am doing. using unity's instead of mine works for now but its intermittent as im sure you all know. and would like help to get mine up and running.