Issue in sided code

Hello, this mod seems really cool. However, it seems like it doesn't work with dedicated servers. I installed version X on a Forge 1.15.1-30.0.51 dedicated server and I'm receiving an InvocationTargetException which traces back to a RuntimeException thrown by forge with the message: "Attempted to load class net/minecraft/client/gui/screen/Screen for invalid dist DEDICATED_SERVER".

Here is the crash report

Let me know if you need any other information.