Did you set it to spigot and go to 1.17? Because if not then it will not work they will show but they can not be used and if you did turn it to 1.17 did you restart server?
So after changing my server to 1.17 then my server repeatedly dropping me into the void and then crashing I changed it back to 1.16.5 and tried and now it does not start and just crashes can anyone help me with both problems