Thanks for the answer, i might look into it in a sp creative world but at the moment I can't get on the server and in the crash log it says : Description: Ticking screen
java.lang.ClassCastException: com.voidzm.novamenu.gui.GuiNovamenuConnecting cannot be cast to net.minecraft.client.multiplayer.GuiConnecting can't figure it out but i'm guessing that novamenu isn't doing good with dmg indicators because when i was on the server the dmg indicators were always grey when i looked at a mob