Trouble in building project in Unity

I create a project in unity by tutorial. But I failed building UWP project. There are some invalid XML files while get packages from nuget.

Like this:

Retrying 'FindPackagesByIdAsyncCore' for source 'http://go.microsoft.com/fwlink/?LinkID=206669/FindPackagesById()?id='System.Runtime.InteropServices''.
The content at 'http://go.microsoft.com/fwlink/?LinkID=206669/FindPackagesById()?id='System.Runtime.InteropServices'' is not valid XML.

���ڰ�ȫԭ�� XML �ĵ��н�ֹ�� DTD����Ҫ���� DTD �������뽫 XmlReaderSettings �ϵ� DtdProcessing ��������Ϊ Parse���������ô��ݵ� XmlReader.Create �����С�

The messy code is "EF BF BD", seems like UTF8 encoding problems?