https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=17704 --- Comment #13 from David Cook <dcook@prosentient.com.au> --- As Tomas mentioned in https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=17704#c8, we have to update our usage of HTTP::OAI in Koha in order to use newer versions, and when we do use a newer version, it'll need to be > 4.07. Note: It's not enough to just use 4.07. I can prove that Koha master will fail with 4.10 in koha-testing-docker: 1) cpanm HTTP::OAI This should install 4.10 2) restart_all 3) Enable OAI-PMH at http://localhost:8081/cgi-bin/koha/admin/preferences.pl 4) Go to http://localhost:8080/cgi-bin/koha/oai.pl 5) Note "Internal Server Error" in the browser 6) Note "Can't call method "processing_instruction" on an undefined value at /usr/local/share/perl/5.24.1/HTTP/OAI/Response.pm line 115." in plack-error.log -- You are receiving this mail because: You are watching all bug changes. You are the assignee for the bug.