pkg_add не может ничего установить на openbsd 6.1

Когда я пытаюсь добавить экран pkg_add или любой другой pkg, я вижу:

ftp://ftp3.usa.openbsd.org/pub/OpenBSD/4.8/packages/i386/screen-4.0.3p1.tgz: unsigned package (signify(1) doesn't see old-style signatures)
ftp://ftp3.usa.openbsd.org/pub/OpenBSD/4.8/packages/i386/screen-4.0.3p1.tgz: unsigned package (signify(1) doesn't see old-style signatures)
ftp://ftp3.usa.openbsd.org/pub/OpenBSD/4.8/packages/i386/screen-4.0.3p1.tgz: unsigned package (signify(1) doesn't see old-style signatures)
ftp://ftp3.usa.openbsd.org/pub/OpenBSD/4.8/packages/i386/screen-4.0.3p1.tgz: unsigned package (signify(1) doesn't see old-style signatures)
ftp: local: -: Broken pipe
421 Service not available, remote server has closed connection.
Can't locate object method "errsay" via package "OpenBSD::PackageRepository::FTP" at /usr/libdata/perl5/OpenBSD/PackageRepository.pm line 845.

/etc/pkg.conf содержит: installpath = http://ftp5.usa.openbsd.org/pub/ OpenBSD /% c / packages /% a /