[deleted] Godot v4 Beta 4 HTML5 builds do not run on popular Itch.io website?
Did you check the export options? You might also be able to customize the HTML or Javascript, but I haven't looked into it. In any case, probably best to create an issue on Github so the developers can fix it.
Also, Godot 4.0 is probably 1 year, or maybe even 2 years, from being production ready. You shouldn't expect to release a serious game using it until it is stable. I just tried the latest beta and it just crashed when trying to convert a project.
It's barely ready for even simple tech demos, forget a real game. Just make sure to test and report bugs, but don't expect it to work 100% for a long time.