To resolve the issue of receiving a "try again" message when uploading photos for an avatar in the Gram AI app, follow these detailed steps:

1. Check Photo Specifications: Ensure that the image you want to upload meets the required specifications, such as file size, format (JPEG, PNG), and resolution. You may face limitations if the image is too large or in an unsupported format.

2. Stable Internet Connection: Make sure you are connected to a reliable and stable internet connection. A weak or intermittent connection can cause upload failures.

3. Log Out and Log Back In: Sometimes, session issues can lead to upload failures. Try logging out of the app and then logging back in to refresh your session.

4. Clear App Cache: If the app has a cache-clearing option, use it. Clearing the cache can resolve many issues related to app performance. If there's an option to clear data, ensure to do it cautiously as it may reset app settings.

5. Update the App: Check if there is an update available for the Gram AI app on the App Store. Updates often fix bugs and enhance performance. Update the app if necessary.

6. Restart Your Device: Sometimes, a simple restart of your device can resolve temporary glitches. Reboot your iPhone and try uploading the photo again.

7. Try a Different Photo: If the problem persists, attempt to upload a different photo to determine whether the issue lies with the specific image you are trying to use.

8. Contact Support: If none of the above solutions work, consider reaching out to Gram AI's support team for assistance. Provide detailed information about your issue, including steps you have already tried.

If you're encountering difficulties due to the app crashing or other related issues, keep an eye on user reviews and forums for any known issues, such as network problems or specific bugs that others may be experiencing - learn more - learn more.