Hi Daniel,

I hope you are well today and thank you for your question.

We can try changing it by developing custom CSS code.

Could you please share me your site URL where the loader is displaying and also share the image URL that you want to display in place of loader icon so that i can help you to achieve it?

Best regards,
Shufflehound team

You can achieve it by adding the following CSS code in the Custom CSS code option of your theme on the below path.

Admin Area -> Appearance -> Theme Settings -> Custom Code -> CSS Code

.sh-page-loader .sk-cube-grid {
    background: url("http://new.platiniumgym.pl/wp-content/uploads/2017/12/page_loader.png") no-repeat;
    background-size: 100%;
}

.sh-page-loader .sk-cube-grid .sk-cube {
    display: none;
}