Most likely the perl you used to run Makefile.PL was not the perl you use to run your program (/home/RTG/common/local_install/Perl5.24/bin/perl).

Update: You can find the perl your shell runs with the following command:

which perl
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Ideally this shows you the perl binary you want to use. Personally, I prefer to be explicit in specifying the full path to the Perl (version) I want to use when installing modules:

/opt/perl/perl-5.24/bin/perl Makefile.PL
make
make test
make install
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