Unity nullreference expcetion when calling PlatformInterface

Hi

I hope this is the right place to ask this question, I couldn’t really find a proper place to ask about Unity and EOS integration.

I’ve followed this guide https://dev.epicgames.com/docs/epic-online-services/game-engines/eos-unity-integration/eos-unity-integration-windows.

And I receive a nullreference exception when calling
return PlatformInterface.Initialize(ref initOptions);.

In the PlatformInterface.cs (which is a file included in the EOS package), #164 line:
var callResult = Bindings.EOS_Initialize(ref optionsInternal);

EOS_Initialize being null.

Why is EOS_Initialize null, and what could cause EOS native bindings not to load in Unity?