I can download the zip version and set it up, works just fine. However I want to use the UIntra package and it won't install. So, as a test, I tried to install just Umbraco via NuGet, clean empty project, just like the instructions. Tried version 7.12.x yesterday and 7.13 today. Same thing, errors and more errors. I get the Readme at the end. I hit Build and get this error...

1>------ Build started: Project: Umbraco, Configuration: Debug Any CPU ------
1>CSC : warning AD0001: Analyzer 'Microsoft.CodeAnalysis.CSharp.Analyzers.FixAnalyzers.CSharpFixerWithFixAllAnalyzer' thr
1>ew an exception of type 'System.TypeInitializationException' with message 'The type initializer for 'Microsoft.CodeAnal
1>ysis.Analyzers.FixAnalyzers.FixerWithFixAllAnalyzer`1' threw an exception.'.
1>  Umbraco -> C:\Sandbox\Umbraco\Umbraco\bin\Umbraco.dll
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========

I hit F5 and get this error:

    Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. 

Parser Error Message: Could not load type 'Umbraco.Web.UmbracoApplication'.

Source Error: 


Line 1:  <%@ Application Inherits="Umbraco.Web.UmbracoApplication" Language="C#" %>
Line 2:            

Source File: /global.asax    Line: 1 

What is wrong?