Remove category page header image in ShopIsle

In ShopIsle theme, you can add an image to a specific category. 

This image appears on the Parent category page as a thumbnail of the category. It also appears in the header of the category page which looks like this:

If you want to remove this image, add the following code at WP-admin > Appearance > Customize > Additional CSS.

.tax-product_cat .page-header-module {
    background-image: none !important;
}

It will look like this:

Just click on "Publish" button, and you're done!