Hi there! I see you’re having trouble with the Timeshifter app on your device. It's been frustrating to encounter a blank white screen after tapping on notifications or the app icon.

Let’s work together to address this issue! Here are some steps we can try:

1. Update the App: Check if there’s an update available for the Timeshifter app. You can do this by going to the Mac App Store, clicking on "Updates," and seeing if Timeshifter is listed. If it is, install the update.

2. Clear Cache: Sometimes, clearing the app's cache can resolve display issues. You can do this by going to the app settings. Though macOS doesn't have a typical cache clearing feature, a reinstall often helps.

3. Reinstall the App: If you haven't already, consider uninstalling and then reinstalling the Timeshifter app. This can sometimes fix underlying issues. You can uninstall the app by dragging it from your Applications folder to the Trash, then reinstall it from the App Store.

4. Check Permissions: Ensure that Timeshifter has the necessary permissions to function correctly. Go to System Preferences > Security & Privacy > Privacy, and make sure that Timeshifter is allowed to access the necessary features.

5. Contact Timeshifter Support: If the problem persists, it might be a good idea to reach out directly to Timeshifter's support team at [email protected] or visit their support page here.

Please try these steps and let me know how it goes! Are you satisfied with the solution I provided?