Embedded Unity Game not building, Error message: Brotli compression may not be supported over HTTP connections

So just to test things out for a future project, I created a Unity game which I want to host on my Next.js website. I downloaded with WebGL from Unity and I placed the game files inside the Public folder in my website. I then embedded the game into my website with iframe.

However, this error message is popping up Error message

Here is my website structure: Website Structure

So far I have

1. Inserted the game files into my project.

2. Created a component using iframe to try and display that game.

I am not sure where the issue is or if I need to configure anything further. Any help at all would be appreciated!

Thanks.