Install package CHAID is throwing error saying package or namespace load failed for 'libcoin'

General
2

It seems you are missing the mvtnorm package, try installing it first.

install.packages("mvtnorm")

Also, you have the 32-bit R version installed, if you don't actually need this version (which is rare this days), I recommend you to uninstall it to avoid having to compile packages for two architectures unnecessarily.