If the plugin gives error "Your license exceeded maximum number of unique IPs. Contact the developer for an enterprise license or connect using previously used IPs.". Add this code at "/etc/hosts" and restart the server.
127.0.0.1 infiniteplugins.com
If you are using pterodactyl, run this command and restart the server.
sudo iptables --insert DOCKER-USER --destination 82.197.83.118 --jump REJECT