Product Image not appearing

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Hi. So I made a theme to have a "personalization" box for some of my products. The products that use this do not show an image or, do not enlarge the product photos. I don't think I wrote the code correctly or, I may have made an error somewhere. The images attached show what a correct product image should look like and the other is showing the error I need help resolving. Screenshot 2021-07-19 134723.jpgScreenshot 2021-07-19 133511.jpg