See bug 33412 https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=33412

The code used to fix the issue (bug is signed off, but has not passed QA or been pushed yet):
$overlay_framework = undef if $overlay_framework eq '_USE_ORIG';

The bug has since been updated and signed off again following feedback. The line changed is now:

    $overlay_framework = undef if $overlay_framework eq '_USE_ORIG_';

If this fixes the issue you are having, it would be really helpful if you could add a comment to the bug or reply to the message.

David Nind

New Zealand