We ask ALL clients to upgrade to Minecraft 1.18.1 due to the Java vulnerability that was located with all versions below this.
You can use this guide to quickly upgrade :- https://billing.piglinhost.com/index.php?rp=/knowledgebase/47/How-to-upgrade-My-Minecraft-server-to-1.18.1.html
If you are using an older version of Forge/Fabric and need it for your modpack, you can continue using this although we do encourage users to upgrade where possible. You may need to swap over under 'Server Version' to your Forge version to continue using an older version however.
If you are unsure, or would prefer for us to do this for you - please reach out via Support Ticket or Discord and we will be able to help.
