Nov 01, 2018 - 04:22 AM
If you are importing a folder of images, be sure to select the folder and do not open it. I suspect this is the issue you are encountering - see this Snack. If you want to import a single image, see this Snack. If you want to add an image as a sticker, see this Snack.
Please open a support ticket if you need additional assistance and we can gather some additional information from you.