Hi! I see you're encountering an "invalid token" error when opening the Fahlo Animal Tracker app on your iPhone with iOS 18.7. To help you better, can you tell me if this error happens immediately when opening the app or after trying to log in? Also, have you already tried any steps like restarting the app or device?

Meanwhile, here’s a straightforward approach we can follow to fix this:

1. Sign out of your Fahlo account in the app (if possible).
2. Close the app completely by swiping it away from your app switcher.
3. Restart your iPhone by turning it off, then back on.
4. Open the Fahlo app again and sign back into your account.

This process helps refresh your app’s connection tokens and often resolves this "invalid token" problem.

If signing out isn't possible or does not fix the issue, the next step would be to uninstall the Fahlo app from your iPhone and then reinstall it from the App Store. This clears the app cache and refreshes the app data, which is often the root cause of token errors.

Please try these steps and let me know how it goes! If the problem persists, we'll dig a little deeper for other fixes.

Are you satisfied with the solution I provided so far?

Source - Quick fix for "Invalid Firebase token" error