Thumbnails are not displayed in the review popup.

Thumbnails are not displayed in the review pop-up selected from all review lists.
However, in the product review, the thumbnail is displayed properly.
I have attached an image. please check.
I wish there was another way to css manipulate the thumbnails.

review img file
https://topclass24.com/product-review/

product img file
https://topclass24.com/product/%ec%99%80%ec%9d%b4%ed%94%84%eb%a1%9c%ec%a0%9d%ed%8a%b8-%ec%99%80%ec%9d%b4%ec%96%b4-%eb%8d%b0%eb%8b%98-%ed%8c%ac%ec%b8%a0/