In the bug https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=12544 was fixed with the -a option to attach an report to email in runreport.pl now in the 3.22.02 version that is not possible and exist reports that need to be attached
Humberto, bug 12544 has been pushed to 3.23.x and will be in the next stable release: 3.24. Enhancements are not backported to stable branches. *** This bug has been marked as a duplicate of bug 12544 ***