Hi there! Sorry to hear the Octopus Energy app crashes when you open it. I’d like to help you get this sorted. Just to start, could you tell me:

- What device and version of the app you’re using? (You mentioned Windows 10 with WebKit browser, but is this the app on a Windows device, or are you using a browser version?)
- Has the app ever worked fine, or is this a new problem?
- Have you tried any fixes so far, like reinstalling the app or clearing its cache?

Based on common causes, here are some initial steps we can try:

1. Restart your device: Sometimes a fresh start can clear minor glitches.

2. Clear app cache (if possible): On Windows apps, check if you can clear cache via the Settings app under “Apps & features” > Octopus Energy > Advanced Options > Reset.

3. Reinstall the app: Uninstall the app fully, then download the latest version from the official source and install it again.

4. Check for Windows and app updates: Make sure both your Windows OS and the app are the latest versions.

5. Turn off FaceID or biometric login in app settings: If you had enabled biometrics, some users found it caused crashes on launch. If you can’t open the app at all, reinstalling without enabling biometrics might help1.

If after trying these the app still crashes, let me know if you get any error messages or can describe what happens exactly, and we can dig deeper.

Does that sound good to start with?