mods/HELP/mcl_craftguide/init.lua

@@ -1109,6 +1109,10 @@ if progressive_mode then
 		local name = player:get_player_name()
 		local data = player_data[name]
 		
+		if not data or not data.inv_items then
+			return
+		end
+		
 		meta:set_string("inv_items", serialize(data.inv_items))
 	end