“Visual Studio update required” but its up to date

Question

I have a fresh install of Visual Studio 2015 community with Windows 10 UWP SDK running in my computer. Recently I tried to open a project that I imported from another computer a

Answer 1

I also stumbled upon this error.

There was a Typo in my old installation of Windows Software Development Kit. When I opened Programs and Features, there was Windows Software Development Kit 10.1.10586.212, but the VS2015 project require version 10.0.10586.212.

So I uninstalled all old ones (there was also 10.0.26624.0), downloaded new installation 10.0.10586.212 from: https://developer.microsoft.com/en-us/windows/downloads/sdk-archive and it now works without any change in .csproj