Netcode for GameObjects Web Socket WebGL build error

I am using Netcode for GameObjects, but everytime I try to build it to WebGL, it gives a "RuntimeError: null function or function signature mismatch,RuntimeError: null function or function signature mismatch" error.

I started using the web socket transport, and I was wondering how I would be able to set up clients for WebGL. I want a linux server and have WebGL clients connect to it. For testing purposes, I want to host using a Windows machine and use WebGL to connect clients to it. However, the error persists.

Is there more setup I need to do before I can build for WebGL? Why does the error persistent even though I am using a web socket transport for my WebGL build?

Start by reproducing the WebGL build with Netcode for GameObjects and the linked WebSocket transport, then inspect the reported null-function or signature-mismatch error and the transport's WebGL setup requirements. Compare the client setup with the intended Linux or Windows server arrangement. Done means identifying whether this is a missing setup step or an incompatibility and documenting the confirmed resolution.