Henlo there too!

Godot 4 HTML5 that app downloads to run locally do not work. The error states that "Cross Origin Isolation" is missing.

It does NOT complain about "SharedArrayBuffer", unlike what usually happens on website when you don't have that enabled.

(This one isn't related to another issue for website I have just posted, it has been always this way, just got around to reporting)

Are you running it with an actual webserver (locally)? Check out this tutorial on how to run the locally downloaded game with node's built-in webserver. There is also a firefox plugin you can try: https://itch.io/blog/456223/godot-cross-origin-isolation-and-sharedarraybuffers