When you start to add all the potions together all is fine- but as soon as you add the night vision to the mix everything goes black, Including the text and chatbox. Even when I left the game the text was still all black in the main menus. I discovered this using the repeating command blocks with each effect using the command //effect give @p (command) 6 100 true. Now I was in my own server so all I had to do was disable command blocks. But this might be a further issue when others try to get the achievement.