Multiplayer Combat Editor

So i just bought MCE and so far I really like it. However, I have a slight problem I could use some help with. I created a new 4.21 project and added the code plugin. Things were moving and I closed down for the night. When I relaunched my project the next day, I get all kinds of script errors and BP errors. I have since switched to an all blueprint project and have not had the same issues.
In other plugins cases, when I want to use them IN code, sure I have to have references in my build.cs, do I need to do the same even though I’m not calling any functionality from C++?