Thank You for all your help ... I finally just did a git clone of 
tdenetwork then did a git checkout of the r14.0.1 commit -  
1da54d8c259178905007ddd1979d53a9e5901cb2 - the package successfully 
compiled and installed :-) ... So thank you for your help!

P.S. :  It may be advisable to change the R14.0.1 - Current download 
package of tdenetwork to reflect the tdenetwork-r14.0.1 source code, 
because until I checked the CMakeLists.txt file I simply assumed that 
the download package tdenetwork-r14.0.1 was the source code for 
tdenetwork-r14.0.1.