Today, we released a new Windows 10 Preview Build of the SDK to be used in conjunction with Windows 10 Insider Preview (Build 19587 or greater). The Preview SDK Build 19587 contains bug fixes and under development changes to the API surface area.
UPDATE 3/25: Windows 10 Insider Preview Fast Build 19592.1001 - March 25
Please post questions and issues that are unrelated to this specific Windows 10 Insider build in the Windows Insider forum area instead.