ERROR: could not find idn library!

CentOS issue resolution:

wget -q https://ftp.gnu.org/gnu/libidn/libidn-1.35.tar.gz tar xfz libidn-1.35.tar.gz

tar xfz libidn-1.35.tar.gz

cd libidn-1.35/

./configure

make

make install

 References 
  libidn