Make sure you choose an advancement parent, this is the tab in the advancement list your advancement will show up. Also you need to have a procedure that awards the player the advancement for completing the objective. unless its something simple like when you eat something.
Make sure you choose an advancement parent, this is the tab in the advancement list your advancement will show up. Also you need to have a procedure that awards the player the advancement for completing the objective. unless its something simple like when you eat something.