Hello!
I can’t build for the web
how to fix the problem (see problem.png)

https://www.esenthel.com/?id=doc#Compilers

https://www.esenthel.com/?id=doc#Web

You cannot publish out of the box. Please see doc in link

edit :quick update to add the list of compilers, that's where it is stated what to add to compile with web

Hello,
all added.Emscripten compiler works well in VS 2010 express,