Unable to update repository FreeBSD Error updating repositories

[Walter Schwarzenfeld]

This

http://pkg.FreeBSD.org/FreeBSD:13:amd64/latest/  <http://pkg.FreeBSD.org/FreeBSD:13:amd64/latest/packagesite.txz:>....
side seems not to exist on http://pkg.freebsd.org/.

Maybe, you try to change the ABI in your /etc/pkg/repos/FreeBSD.conf to 12
install "pkg" and if it is successful recompile it in the port.