There is an ongoing outage on the primary CPAN mirror. It is possible to work around the issue by using MetaCPAN as a mirror.
This just calls App::Pod->run
Module Install Instructions
To install App::Pod, copy and paste the appropriate command in to your terminal.
cpanm App::Pod
perl -MCPAN -e shell
install App::Pod
For more information on module installation, please visit the detailed CPAN module installation guide.