If you're unable to save your Polaroid wallpaper due to an ad not loading, follow these steps to resolve the issue:

1. Check Internet Connection: Ensure your iPhone is connected to a stable internet connection. Sometimes a weak or inconsistent connection can cause ads not to load.

2. Clear App Cache: Some apps allow you to clear their cache which can help resolve loading issues. Go to Settings, locate the app, and check if there's an option to clear cache or data.

3. Restart the App:
- Close the Polaroid app completely. On iPhones with Face ID, swipe up from the bottom of the screen and pause in the middle to see all open apps. Swipe up on the Polaroid app to close it.
- Reopen the app and try creating your wallpaper again.

4. Update the App: Ensure that you are using the latest version of the Polaroid app. Go to the App Store, search for the app, and see if there’s an available update. If so, update it.

5. Enable Ads Permissions: Sometimes, restrictions on ad permissions can lead to these issues:
- Go to Settings > Privacy & Security > Advertising, and ensure that you have allowed ads within the Polaroid app context.

6. Disable Ad Blockers: If you have any ad-blocking applications or settings enabled, consider disabling them temporarily to see if that resolves the issue with loading ads.

7. Reinstall the App:
- Uninstall the Polaroid app from your iPhone. Long press the app icon until it wiggles and tap on the 'X' to delete.
- Reinstall it from the App Store and check if the problem persists.

8. Contact Support: If none of the above steps work, consider reaching out to the app's support team for assistance. There might be specific issues they're aware of regarding saving wallpapers.

By following these steps, you should be able to resolve the issue of not being able to save your Polaroid wallpaper due to an ad not loading. - learn more - learn more - learn more.