Dashboard error (Use of uninitialized value) while running

I received this error twice via email, which I believe is generated by cron::

Use of uninitialized value in numeric gt (>) at /usr/libexec/nethserver/api/nethserver-mail/dashboard/pflogsumj line 1225, <> line 17906.
Use of uninitialized value $bounceReas in substitution (s///) at /usr/libexec/nethserver/api/nethserver-mail/dashboard/pflogsumj line 871, <> line 17906.
Use of uninitialized value $bounceReas in hash element at /usr/libexec/nethserver/api/nethserver-mail/dashboard/pflogsumj line 873, <> line 17906.
Use of uninitialized value in numeric gt (>) at /usr/libexec/nethserver/api/nethserver-mail/dashboard/pflogsumj line 1225, <> line 17935.
Use of uninitialized value $bounceReas in substitution (s///) at /usr/libexec/nethserver/api/nethserver-mail/dashboard/pflogsumj line 871, <> line 17935.
Use of uninitialized value $bounceReas in hash element at /usr/libexec/nethserver/api/nethserver-mail/dashboard/pflogsumj line 873, <> line 17935.
Use of uninitialized value in numeric gt (>) at /usr/libexec/nethserver/api/nethserver-mail/dashboard/pflogsumj line 1225, <> line 17986.
Use of uninitialized value $bounceReas in substitution (s///) at /usr/libexec/nethserver/api/nethserver-mail/dashboard/pflogsumj line 871, <> line 17986.
Use of uninitialized value $bounceReas in hash element at /usr/libexec/nethserver/api/nethserver-mail/dashboard/pflogsumj line 873, <> line 17986.