I am trying to build HElib from source by running 'make' from within src/ folder.
However, I get the following errors -
'#include <json.hpp>" - No such file or directory
‘any’ in namespace ‘std’ does not name a type
helib/version.h: No such file or directory

How to fix these errors, so that programs can run like those in - https://github.com/GaloisInc/helib-demos/tree/master