Centering shortcode in page/post

I’m trying to display my rotating images in the middle of my page/post. However, no matter what I do, they are always being displayed on the left of the page.

I’ve tried wrapping the shortcode in a div <div style=”textalign: center”>[shortcode]</div>, but that does not work.

Is there anything that you could suggest to get this to work?

Thanks much!

https://wordpress.org/plugins/weptile-image-slider-widget/