installing maddump

Dear Olivier,

I am trying to install the maddump in madgraph and my OS is a mac, but I am getting the. following error.

   You are installing 'maddump', please cite ref(s): arXiv:1806.xxxxx.
Downloading http://madgraph.physics.illinois.edu/Downloads/maddump/
  % Total % Received % Xferd Average Speed Time Time Time Current
                                 Dload Upload Total Spent Left Speed
100 758 100 758 0 0 1435 0 --:--:-- --:--:-- --:--:-- 1438
tar: Unrecognized archive format
tar: Error exit delayed from previous errors.
Error detected in "install maddump"
write debug file MG5_debug
If you need help with this issue please contact us on https://answers.launchpad.net/mg5amcnlo
MadGraph5Error : Fail to download correctly the File. Stop

I will be grateful to you if you kindly help me sorting this issue. I am also pasting the debug file for your convenience :

                        OLP : MadLoop
                    amcfast : amcfast-config
                   applgrid : applgrid-config
                auto_update : 7
         cluster_local_path : None
           cluster_nb_retry : 1
              cluster_queue : None (user set)
         cluster_retry_wait : 300
               cluster_size : 100
      cluster_status_update : (600, 30)
          cluster_temp_path : None
               cluster_type : condor
                    collier : ./HEPTools/lib
               cpp_compiler : None
             crash_on_error : False
               delphes_path : ./Delphes
                 eps_viewer : None
        exrootanalysis_path : ./ExRootAnalysis
              f2py_compiler : None
                    fastjet : None (user set)
           fortran_compiler : None
                      golem : None (user set)
                 hepmc_path : None (user set)
                  hwpp_path : None (user set)
                     lhapdf : /Users/dipyamanpramanik/Documents/software/MG5_aMC_v2_6_4/HEPTools/lhapdf6/bin/lhapdf-config (user set)
          madanalysis5_path : /Users/dipyamanpramanik/Documents/software/MG5_aMC_v2_6_4/HEPTools/madanalysis5/madanalysis5 (user set)
           madanalysis_path : ./MadAnalysis
  mg5amc_py8_interface_path : None (user set)
                      ninja : ./HEPTools/lib
        output_dependencies : external
                      pjfry : None (user set)
            pythia-pgs_path : ./pythia-pgs
               pythia8_path : /Users/dipyamanpramanik/Documents/software/MG5_aMC_v2_6_4/HEPTools/pythia8 (user set)
                    samurai : None
               syscalc_path : ./SysCalc
                    td_path : ./td
                text_editor : None
                thepeg_path : None (user set)
                    timeout : 60
                web_browser : None

Please have a look and help me out.

Thanks in advance,
Dipyaman