Creative server was just updated to Minecraft 1.17! All plots and blocks were converted and are still there, if you find any bugs please report them so we can fix them :)

As of now, you can only connect to Creative server with Minecraft 1.9 or higher, Minecraft 1.17 / 1.18 is recommended (at least 1.16.5 if you can't run 1.17 and higher).