Hey there! I understand your UnitedMasters app is stuck on the loading screen on your ChromeOS device. Let's see how we can get that sorted out.

First, just to clarify—have you tried any steps already, like restarting the app or your device? Also, are you using the UnitedMasters app directly or accessing it through a browser on your WebKit-based ChromeOS?

Meanwhile, here’s a simple step-by-step approach we can start with:

1. Restart the App: Close the UnitedMasters app completely and relaunch it. Sometimes, this refreshes any temporary glitches.

2. Clear Cache and Data: Since you’re on ChromeOS, if you’re using the web app, try clearing your browser's cache and cookies for UnitedMasters. That can help with stuck loading screens.

3. Check Internet Connection: Ensure your ChromeOS device has a stable internet connection. Sometimes loading issues are network related.

4. Update the App or Browser: Make sure your UnitedMasters app is updated to the latest version. If you use a browser, ensure ChromeOS and Chrome browser are up to date.

If these don't work, there might be a deeper issue such as server-side problems or account-specific glitches.

Could you tell me if you see any error messages or if it loads a bit before freezing? That info will help me narrow down solutions.

Looking forward to your reply!