Oh that's so frustrating! That happens to me sometimes. First - make sure you're not on an iPad or tablet. This feature only works on the desktop. Second - please try to drag it over the red square and hold it. Sometimes it takes about 10 seconds, especially if the images are high res. Make sure that you're holding the image directly over the red square. If these tricks don't help, then please chat with us so we can help out!
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