from what I read the problem might be that the game is looking for a save file when HTML doesn't support such a thing, and then breaks. Might need to disable saving for the HTML version
Saving is done through Charon, not the menu, so I worry that disabling saving on this version may not help. I think this issue may be caused by your web browser's cookies. Please check out this page and let me know if it helps. https://growthdot.com/help/failed-to-read-the-localstorage-property/#:~:text=To%20fix%20this%2C%20you%20need,cookies%20into%20the%20address%20bar.