Hi there! I understand your Homeroom app seems frozen on one class, and you're unable to switch to another class—something that hasn't happened before. Let's try to figure this out together.

First, could you tell me if you have tried restarting the app or refreshing the page? Sometimes, temporary glitches can cause this kind of behavior.

If you haven't tried that yet, here's a simple step-by-step approach:

1. Close the Homeroom app completely. Make sure it's not running in the background.
2. Restart your device (since you mentioned you are on Windows 10, simply click Start > Power > Restart).
3. After the device is back on, open the Homeroom app again and try switching classes.

If the problem persists:

4. Check your internet connection to ensure it's stable and strong, as a poor connection might cause the app to freeze when switching classes.
5. Clear the cache and cookies of the browser you are using (WebKit). In Windows 10, open your browser settings > Privacy & Security > Clear browsing data, then select cached images and files and cookies.
6. Log out of your Homeroom account and log back in, as sometimes a fresh login can fix session-related issues.

If none of these help, there might be a bug or a temporary issue on the Homeroom side. Have you noticed any notifications about updates or maintenance? Also, are other users experiencing the same issue?

Let me know what you've tried so far and what happens after these steps. We can proceed further from there. Are you okay with trying this?