Many occassions I found following error message after upgrade from very old version of Koha to the latest version.
Software error:
Can't call method "branchname" on an undefined value at /usr/share/koha/lib/C4/Biblio.pm line 1570.
Can't call method "branchname" on an undefined value at /usr/share/koha/lib/C4/Biblio.pm line 1570.
The solution is that execute a full index of Zebra. Apply following command;
sudo su
koha-rebuild-zebra -f -a -b -v library