This guide shows you a potential solution for the endless loading issue in the Sound Alerts Extension.
The issue can occur when your Windows Time Zone is set wrong or manually. To fix this, you must hit your Windows button and type: Change the time zone. Hit Enter and ensure that "Set time automatically" is enabled.
Now head back to the Stream you watched before and press CTRL + F5. After reloading the page, everything should work again.
If it is not working, please hit F12, take a screenshot of the Console tab, and open a ticket here or join the Sound Alerts Discord Server, where you can also open a ticket