Failure points

make installworld

At installworld Make: "/usr/src/Makefile"
line 360: Check your date/time

adjkerntz -i

pkg

pkg-static: unable to open
vulnxml file (null): Invalid argument

pkg audit -F

make config

===> Options unchanged

pkg install dialog4ports

poudriere ports -u

# Host: github.com
# Port: 443
# Repository: /freebsd/freebsd-ports.git
# Target: /usr/ports
# Have: 4010f7bbc03638d71781ce091bf40a0907fa12fe
# Want: 4010f7bbc03638d71781ce091bf40a0907fa12fe
# Branch: main
[00:00:00] Updating portstree "default" with git...fatal: couldn't find remote ref refs/heads/master

poudriere ports -d
poudriere ports -c -B main -m git

firefox build failure

===>  Configuring for rust-1.83.0
Bad system call
=> Sanity check failed: kernel is missing COMPAT_FREEBSD11
=> Aborting build
*** Error code 1

Stop.
make[5]: stopped in /usr/ports/lang/rust
*** Error code 1

Re-edit applicable kernel config file to include:

options COMPAT_FREEBSD11 # Compatible with FreeBSD11

Stop or disable tailscale breaks networking

tailscale will generate an /etc/resolv.conf file for its use.  If you quit the service, the resolv.conf will still be in effect, loaded but it will be invalid. If you saved your resolv.conf prior to working with tailscale, you can restore it, or create a new one similar to below.

nameserver 127.0.0.1
nameserver 10.0.0.1
#nameserver 192.168.1.1
#nameserver 8.8.4.4
options edns0
#search localnetworkname

Some lines commented out but could be used if you wish.  Check man 5 resolver