I have searched on the Internet for many days, but cannot find the right solution! Please help me!
I had the same problem (not sure but) after installing the Visual Studio 2019. The Visual Studio 2019 solves this problem though.
I was just going to say, it sounds like you are either missing c++ compiler or you need to try retargeting your project match your tools (right click the solution and select “retarget solution”) – the compiler is complaining that it can’t find the build tools.
if helpful here are some notes I give my students about visual studio – and also a walk through video where I kind of talk about visual studio a bit and give some tips: