When you try to save a profile for the patron card creator in 3.10.9 and master you get this error: Software error: Can't call method "save" without a package or object reference at /home/nengard/kohaclone/patroncards/edit-profile.pl line 72.
I just debugged this on the koha email list. edit-profile.pl isn't checking whether it got back an object or a scalar (probably -1 to indicate unsatisfactory @params) from the new() call and so it tries to call methods on a scalar result which results in this error.
I cannot reproduce this in the current master.
I cannot reproduce this in master or 3.10.09. Perhaps something is messed up with that particular installation?
I tested on current master and creating patron card creator profiles works ok for me. Closing this as it does not seem to be reproducable and 3.10 is no longer maintained. Please open a new bug if problem reappears.