Hello,
Sorry to say but your provided WP-ADMIN Login details aren’t working. They are incorrect.
Although, as we are seeing this on your Site through the Inspect tool a Background Color white is showing being added on the Hover Image class. So, you can try using the below Custom CSS code and paste it to Dashboard >> Theme Settings >> Custom CSS >> Global CSS section:
.product-grid-item .hover-img { background-color: transparent !important; }
Hope this works out for you !
Best Regards