The format of the image is unsupported.

Convert the image to a JPEG, PNG, or BMP file and try again.

Your vault contains an image with the same name.

Make sure you haven’t added this image to your vault yet.

Rename the image and try again.

The image is too large.

Reduce the size of the image and try again.

No internet connection while trying to add an image from iCloud.

Connect to the Internet and try again.