Problem with pkg_add

[dnslc]

I am trying to install packages on NetBSD but it isn't working.

armv7$ export PKG_PATH="http://cdn.netbsd.org/pub/pkgsrc/packages/NetBSD/earmv7hf/9.0/All"
armv7$ pkg_add -v sudo
pkg_add: Can't create pkgdb entry: /var/db/pkg/sudo-1.8.31: Permission denied
pkg_add: no files matching ``/var/db/pkg/sudo-1.8.31/+*'' found: No such file or directory
pkg_add: 1 package addition failed

so I log into root and install it

armv7$ su
Password:
armv7# pkg_add -v sudo

and sudo successfully installed

but now I can't install anything else

armv7$ sudo pkg_add -v wget
pkg_add: no pkg found for 'wget', sorry.
pkg_add: 1 package addition failed
armv7$ sudo pkg_add -v emacs
pkg_add: no pkg found for 'emacs', sorry.
pkg_add: 1 package addition failed
armv7$ echo $PKG_PATH
ftp://ftp.netbsd.org/pub/pkgsrc/packages/NetBSD/earmv7hf/9.0/All

I have tried both

armv7$ export PKG_PATH="http://cdn.netbsd.org/pub/pkgsrc/packages/NetBSD/earmv7hf/9.0/All"

and

armv7$ export PKG_PATH="ftp://ftp.netbsd.org/pub/pkgsrc/packages/NetBSD/earmv7hf/9.0/All"

It was working just a few minutes ago, not sure why it stopped.
I have also been to those links and confirmed that the packages are in fact there.
I am still able to ping websites so it isn't a network problem.

[dnslc]

Just started working again

armv7$ pkg_add -v mg
pkg_add: Can't create pkgdb entry: /var/db/pkg/mg-20110905nb4: Permission denied
pkg_add: no files matching ``/var/db/pkg/mg-20110905nb4/+*'' found: No such file or directory
pkg_add: 1 package addition failed

Not sure why, maybe it was the server?

Edit:

armv7$ pkg_add -v pkgin
pkg_add: Can't create pkgdb entry: /var/db/pkg/pkg_install-20191008nb1: Permission denied
pkg_add: no files matching ``/var/db/pkg/pkg_install-20191008nb1/+*'' found: No such file or directory
pkg_add: Can't install dependency pkg_install>=20130901
pkg_add: 1 package addition failed
armv7$ sudo pkg_add -v pkgin
pkg_add: no pkg found for 'pkgin', sorry.
pkg_add: 1 package addition failed
armv7$ pkg_add -v pkgin
pkg_add: Can't create pkgdb entry: /var/db/pkg/pkg_install-20191008nb1: Permission denied
pkg_add: no files matching ``/var/db/pkg/pkg_install-20191008nb1/+*'' found: No such file or directory
pkg_add: Can't install dependency pkg_install>=20130901
pkg_add: 1 package addition failed
armv7$ su
Password:
armv7# pkg_add -v pkgin
[...] installed

Still behaving strangely, even though my account is in the wheel group and can use `sudo' for other commands, only root is able to use `pkg_add'