Use of uninitialized value $file_name Slurp.pm

[KhronosWebservices]

We're attempting to export some bugs from one of our Bugzilla installs into a private repository on Github. I've copy/pasted below how we run your perl script and the output we get:

./BugzillaMigrate-master/bzmigrate.pl -i -f show_bug.cgi.xml
Wich Bugzilla product would you like to migrate bugs from? PRODUCTNAME
Enter the owner of the GitHub repo you want to add issues to.
GitHub owner: KhronosGroup
Enter the name of the repository you want to add issues to.
GitHub repo: https://github.com/KhronosGroup/PRIVATEREPOSITORY
Enter your GitHub user name: GITHUBUSERNAME
Use of uninitialized value $file_name in -e at /home/perl5/lib/perl5/File/Slurp.pm line 116, line 4.
Use of uninitialized value $file_name in sysopen at /home/perl5/lib/perl5/File/Slurp.pm line 193, line 4.
Use of uninitialized value $file_name in concatenation (.) or string at /home/perl5/lib/perl5/File/Slurp.pm line 194, line 4.
Enter your GitHub API token:
Not a HASH reference at ./BugzillaMigrate-master/bzmigrate.pl line 138.

Is this from us running the script incorrectly, or a problem with the script itself? File::Slurp is on v9999.19