I have the same error.
If downloading the files manually
fetch -a https://pkg.opnsense.org/FreeBSD:14:amd64/26.1/sets/packages-26.1.1-amd64.tar
fetch -a https://pkg.opnsense.org/FreeBSD:14:amd64/26.1/sets/packages-26.1.1-amd64.tar.sig
and checking it with "opnsense-verify -q packages-26.1.1-amd64.tar"
i get error "opnsense-verify: error:02000068:rsa routines::bad signature"
base-26.1.1-amd64.txz fails too
kernel-26.1.1-amd64.txz does not fail
This is quite strange...
If downloading the files manually
fetch -a https://pkg.opnsense.org/FreeBSD:14:amd64/26.1/sets/packages-26.1.1-amd64.tar
fetch -a https://pkg.opnsense.org/FreeBSD:14:amd64/26.1/sets/packages-26.1.1-amd64.tar.sig
and checking it with "opnsense-verify -q packages-26.1.1-amd64.tar"
i get error "opnsense-verify: error:02000068:rsa routines::bad signature"
base-26.1.1-amd64.txz fails too
kernel-26.1.1-amd64.txz does not fail
This is quite strange...
"