If a photo gets stuck while you sell, the cause is almost always the connection, a missing permission or an oversized image.
- Allow access to your photos: the first time, the app asks for permission. You can grant it in your phone settings.
- Check your connection and prefer Wi-Fi for several uploads.
- Send fewer photos at once if the upload keeps failing.
- Try again after closing and reopening the app.
The app automatically optimises your photos for a fast upload, so there's nothing to do on your side. A very large image is simply resized before sending.
If one particular photo keeps failing, try another: the original file may be corrupted.