# Mobile In-App Troubleshooting

Mobile In-App issues fall into two paths. Choose the path that matches the problem you are solving.

## Campaign Troubleshooting

Use this path when you manage campaigns in Engage Studio:

- The message does not display.
- Launch succeeded but the change is not visible.
- An expected `impression` is not recorded.
- A campaign does not match the test customer.


See [Campaign Troubleshooting](/products/marketing-cloud/engage-studio/channels/mobile-inapp/campaign-troubleshooting).

## SDK Troubleshooting

Use this path when you integrate or debug the mobile SDK:

- SDK initialization or `TDEngage.install` fails.
- A Hosted Pages URL does not load or cannot close.
- `window.TDContext` is empty.
- A link, Deep Link, or custom action behaves incorrectly.
- An APNs or FCM token is not registered.


See [SDK Troubleshooting](/products/marketing-cloud/engage-studio/channels/mobile-inapp/sdk-troubleshooting).

## Related Documentation

- [Mobile In-App Events and Fields](/products/marketing-cloud/engage-studio/channels/mobile-inapp/supported-events-and-fields)
- [Mobile In-App Measurement](/products/marketing-cloud/engage-studio/channels/mobile-inapp/measurement)
- [Engage Mobile SDK API and Event Reference](/products/marketing-cloud/engage-studio/channels/mobile-inapp/sdk-reference)
- [Set Up Mobile In-App Messaging](/products/marketing-cloud/engage-studio/channels/mobile-inapp/setup-and-prerequisites)