書いたとしてもほぼ同じです

# pkg-static install -f pkg
pkg-static: Warning: Major OS version upgrade detected. Running "pkg-static install -f pkg" recommended
Updating FreeBSD repository catalogue...
Fetching meta.txz: 100% 944 B 0.9kB/s 00:01
Fetching packagesite.txz: 100% 4 MiB 413.3kB/s 00:11
pkg-static: rsa verify failed: error:04091077:rsa routines:INT_RSA_VERIFY:wrong signature length
pkg-static: No trusted certificate has been used to sign the repository
Unable to update repository FreeBSD
All repositories are up-to-date.
pkg-static: Repository FreeBSD cannot be opened. 'pkg update' required
Checking integrity... done (0 conflicting)
The most recent version of packages are already installed