Hi there! I'm sorry to hear you're having trouble with the Potbelly Sandwich Works app. It sounds like you're encountering a bug message, which can happen sometimes. Let’s try to get it working again!

1. Restart the App: First, make sure to completely close the app. Do this by swiping it away from your recent apps list, then try reopening it.

2. Check for Updates: Next, let's check if there are any updates available for the app. You can do this by going to your respective app store (Google Play Store for Android or App Store for iPhone). If an update is available, install it.

3. Clear Cache (for Android users): If you're using an Android device, you might want to clear the app's cache. Go to your device's Settings > Apps > Potbelly Sandwich Works > Storage > Clear Cache.

4. Reinstallation: Since the app mentions a bug, reinstalling it might help. Uninstall the app and then download it again from the app store.

5. Device Compatibility: Ensure your device's operating system is compatible with the latest version of the app. Sometimes older versions of an OS can cause issues.

If these steps don’t resolve the issue, it might be a bug that needs to be fixed by the developers. In that case, you can check the Potbelly Sandwich Works support page here.

Are you satisfied with the solution I provided? If the app is still not working, I'm here to help you further!