I too made my game using Godot 4.1. On your game page, make sure you have SharedArrayBuffer support checked under the embed options. This is an experimental option, and from what I have read will only work in Chrome based browsers.
Hi, thanks for your suggestion. I found that the solution was to upload the entire game folder (including the index.html, index.wasm, index.pck, and other files) instead of just the .html file.