Hello!
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Please check: 

1. Your photo is in RGB color mode

2. Your photo is in 8bit color mode

3. You are running the English version of Photoshop.


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HOW TO USE THE OVERLAY
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1. Open a photo 

2. Open the Overlay image

3. Drag and drop the overlay image to your Photo

4. Change blending mode to screen or overlay

5. Save
