Project wont build
1. Projects have a filename that ends in .proj. When you go to them in Visual Studio they can be managed from the properties panel. but there is no mark up accessible from visual studio. There is also no file content to search based on your error
2. Sometimes you are required to install URL rewrite module
3. Files are referenced. But the references point to the bin folder. This is not going to get checked in or pulled down from a Source control application which is probably filtering it.
4. You web configuration is pointing to a database that it cant connect too.
Web Api Projects
1. 404 returned from a web service call. Routes are being registered out of order. Route path has the word action in it.