向源控件添加解决方案会导致错误

Question

我正在尝试将我的visual studio项目添加到源代码管理中。每当我选择'Add solution to source control'时，它会在输出窗口中显示以下消息。

Opening repository: C:\Users\myUserName. 
An error was raised by libgit2. Category = Unknown (Error).
No error message has been provided by the native library

我正在使用Visual Studio 2013 Express for Web。