Inspiron-3670:~/ensembl-vep$ perl INSTALL.pl 
curl failed (000), trying to fetch using LWP::Simple
LWP::Simple failed (500), trying to fetch using HTTP::Tiny
ERROR: Failed last resort of using HTTP::Tiny to download https://raw.githubusercontent.com/Ensembl/ensembl-vep/release/104/modules/Bio/EnsEMBL/VEP/Constants.pm