I am in the process of updating the server to 1.16.4. This is a time consuming process and may be a few months, give or take to complete it. In this time, the server will be down and inaccessible. The world will be updated in this process too. Don't worry, all builds and what not will be preserved. The protection process for land will also be reassessed from the current plugin, MCTowns. More updates on the way, I hope. Cheers, Hockeymikey
