To resolve the crashing issue with the Domus One app and the inability to log in, follow these steps:

1. Check Internet Connection: Ensure your internet connection is stable. An unstable connection may cause apps to crash. You can try connecting to a different Wi-Fi network or switching between Wi-Fi and mobile data.

2. Restart Your Device: A simple reboot can often clear minor software glitches that may be causing the app to crash. Power off your device completely and then turn it back on.

3. Clear App Cache: To remove temporary files that might be causing the issue:
- Go to Settings on your device.
- Tap on Apps or Application Manager.
- Find and select Domus One.
- Tap on Storage.
- Select Clear Cache.

4. Update the App: Ensure you have the latest version of the Domus One app installed, as updates can fix bugs.
- Open the Google Play Store (or Apple App Store).
- Search for the Domus One app.
- If an update is available, tap Update.

5. Reinstall the App: Uninstalling and then reinstalling the app can resolve persistent crashing issues.
- Press and hold the Domus One app icon.
- Select Uninstall.
- Go to the Google Play Store (or Apple App Store), search for Domus One, and install it again.

6. Free Up Storage Space: Ensure there is sufficient storage space on your device as limited storage can affect app performance.
- Go to Settings > Storage to check available space.
- Delete any unnecessary files or apps.

7. Contact Support: If the problem persists after trying the above steps, reach out to Domus support for assistance. They may provide specific solutions or check for any ongoing issues with the app.

Following these steps systematically should help you resolve the crashing issue with the Domus One app. If you encounter any other specific error messages while logging in or using the app, note those down, as they can be useful for troubleshooting with support.

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