# Error: Upload a valid app bundle.

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In the rare event that you get the following error: ***"Upload a valid app bundle",*** you may be attempting to load an invalid file when using Google Play Signing. This can be any file that is not an .AAB file downloaded from your Adalo Builder.&#x20;

#### Resolution

1. **You are loading an .APK instead of an .AAB.**
   * Ensure you are loading the correct file downloaded from Adalo.&#x20;
   * If the file type you downloaded from the builder is .APK, please [contact our Support Team](https://info.adalo.com/submit-a-support-ticket) for assistance.
2. **You are loading a different file type that is not a valid android app bundle (.AAB)**
   * Ensure the file you are loading is the valid .AAB file from your Adalo Builder.
   * Discard release and submit a new release.

### **Still Need Help?**

If you're stuck, don't worry! Reach out to our [support team ](https://info.adalo.com/submit-a-support-ticket)for further assistance.

1. Include Steps Taken: Let us know what troubleshooting steps you've already tried.
2. Add Screenshots: Share relevant screenshots showing the error message and the Package Name of the Listing you're trying to update.

Remember, we're here to help you get your app back on track and ready to shine on the Google Play Store!


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