# Troubleshooting

## Known Issues

Our team is actively investigating the following issues:

* **Video assets** in AR.js with **NFT-support image tracking** fails to show on iPad while audio plays. Using an iPhone or using market-based image tracking should work.

## I can't see the 3D asset!

### Are you pointing to the right target?

Make sure to point your phone to the QR code or, if you set an image target, to the image you uploaded.

### Is your asset too small/big?

It might be the case that your 3D asset is too small or too big to appear in the camera view.

Scale the model by pinching the screen with two fingers. If that does not work, change the size of the model by adding a metadata key named `scale` to the 3D models. See how to add metadata in the [Data Page](https://docs.echo3d.com/web-console/manage-pages/data-page/how-to-add-data#1-adding-a-data-entry-1) section of the documentation.

Now **rescan the QR code** to rebuild and refresh your AR.js app.

## I am getting some other error.

Let's talk! Ask on [Slack](https://go.echo3d.co/join) or send an email to <support@echo3D.com> and please attach a screenshot of the error you are experiencing.