Hello! I understand your Mail Hub app won't open, and I’m here to help you get it running again. Could you please tell me a bit more? For example, do you see any error messages or a blank screen when you try to open it? Also, have you tried any steps yet to fix it?

Meanwhile, based on common causes for an app not opening on Windows 10 with WebKit-based browsers, here are some initial steps we can try:

1. Restart Your Computer
Sometimes, a simple reboot clears out temporary glitches affecting apps.

2. Check for App Updates
Go to Microsoft Store, check if there’s an update for Mail Hub, and install it.

3. Clear App Cache and Data
While this is generally more common on phones, on Windows you can reset the Mail Hub app:
- Open Settings > Apps > Apps & Features
- Find Mail Hub in the list, click it, then select "Advanced options"
- Click "Reset" (this deletes app data, so you may need to log in again)

4. Check Firewall and Antivirus Settings
Sometimes apps are blocked by firewall rules. Go to Windows Defender Firewall > Allow an app through firewall, and ensure Mail Hub is allowed on your network profile.

5. Run Windows Troubleshooter for Apps
Go to Settings > Update & Security > Troubleshoot > Additional troubleshooters > Windows Store Apps, and run it.

If none of those work, we can dig deeper, checking for conflicts, user account issues, or reinstalling the app.

Could you try these and let me know what happens? Also, if you can describe anything specific you see when attempting to open Mail Hub, that will help me narrow down the best next steps.

does not open blank screen

Thanks for the details! A blank screen when opening the Mail Hub app usually points to a loading or cache issue. Since you mentioned it does open but just stays blank, here’s a focused approach to try:

1. Clear the Cache and Data of Mail Hub
- Since you’re on Windows 10, go to Settings > Apps > Apps & Features
- Find Mail Hub in the list, click it, then select Advanced options
- Click Reset to clear the app’s cached data. This will log you out, but can fix corrupted app data causing the blank screen.

2. Restart Your Computer
- After resetting, restart your PC to refresh all system processes.

3. Update the App
- Open Microsoft Store, check if there’s an update available for Mail Hub, and install it.

4. Check Network Connection
- Ensure your internet connection is stable, as the app may need to load content from servers.

If the problem persists after these, uninstalling and reinstalling the app might be the next step, as it can fix more stubborn issues1.

Would you like me to guide you through any of these steps?