When trying to restart the firewall you get the error:
IPSET: [ipset v7.5: Error in line 65538: Hash is full, cannot add more elements]
This error is usually caused by a large blocklist or country block. You can try increasing the ipset hashsize and ipset maxelem limits under Juggernaut -> Settings -> Firewall -> General Settings. As a last resort you can also try removing the blocklist or country that you added and see if it fixes the error.