If your Single-Issue app starts, shows the splash image, and then crashes, it may be due to missing content. This article provides information on how to resolve the problem.
Note: If the problem is not resolved by following the instructions below, please submit a support ticket.
iOS - How to Fix a Single-Issue App That Crashes Due to an Unpublished Issue
4. Restart your app and it should now start to download the Issue.
Note: Always make sure that your Issue is published before sending it in for review with Apple, otherwise the app will be rejected.
Android - How to Fix a Single-Issue App That Crashes Due to Missing Content
Android Single-Issue apps work differently than iOS Single-Issue apps due to how the different platforms handle content for single-issues. Android uses an "Expansion File" format to literally embed the content into the single-issue app. To embed your content into an Android Single-Issue app, please read the following support article:
You will need to make sure you have uploaded your MIB into the APK when you submitted it to the Google Play Store.