Hi, @Noppes.
I have a great request for you!
Could you upgrade Custom NPCs to version 1.16.1 or higher (depending on when you read it)?
The latest version of your mod is still for 1.12.2, and since then many new things the MC received.
I love your mod. It's brilliant! All my most enjoyable MC games were due to his presence and ingenious, very helpful content.
That's why you would really please me by fulfilling my request. I hope you read it. And, by the way, many thanks for a great job doing this mod. :3