Why isn't my color swatch updating the product image on Impact theme?

Hello,

In my store product page when I click on the color swatch original product image is not changing. ex. when I click on brown swatch still showing old grey image you can see here is my store https://storageshedshop.com/products/11-ft-x-7-ft-wood-plastic-composite-heavy-duty-storage-shed-pent-roof-and-double-doors-graphite-color-77-sq-ft?variant=48331036262689

I use Impact theme version 5.1.2. Please advice

Yes I uploaded on product page.

Can you please tell me where should I upload my variant image?

I have already uploaded Brown variant image in products. I have attached image for your review.

I already did that but still when I click on brown variant product image is nor changing

Select a different “Desktop media layout” setting for your “Product page” sections – one of "Thumbnails … ".

You have “Grid …” selected – for these layouts there is no image change on variant selection.

Thanks it’s working now but I want in Grid something like this https://themes.shopify.com/themes/impact/styles/shape/preview

when I select on gray color it’s shows me all gray colors different images. Can you please help me?

You can visit my website: https://storageshedshop.com/products/11-ft-x-7-ft-wood-plastic-composite-heavy-duty-storage-shed-pent-roof-and-double-doors-graphite-color-77-sq-ft?variant=48331036262689

this? https://impact-theme.helpscoutdocs.com/article/556-variant-images-set