itch.io

Yeah I got that error while uploading it too. I thought I'd fixed it; the solution I found on the web was to enable SharedArrayBuffer support on the itch.io page. But even itch.io says "(Experimental) This may break parts of the page or your project. Only enable if you know you need it." So sadly I think this is just the cost of using Godot 4.0 on the web for now. I might be able to improve it when the jam's over by changing some headers. Next time I'll probably stick with 3.0 instead.

Edit: If you want you could try changing browsers.  I mean you don't have to, but I'd appreciate it so that I can let other people know in the description. It works in Firefox on my computer if that helps.