killall -9 crowdsec
It's a known issue, the forum is full of threads about this. If you had used the search function ...A particular version of crowdsec hangs when OPNsense tries to reboot. Just kill the processes and the update proceeds without error. Since the update also includes a crowdsec update, the problem is supposed to be solved after that.
https://forum.opnsense.org/index.php?topic=43309.0https://forum.opnsense.org/index.php?topic=43337.0