Width Not Displaying Correctly in Sidebar

I cannot get the width to display at 100% in my sidebar. I tried another flickr widget and it displayed correctly (filled the sidebar space). It could be a theme conflict. Any workaround?

I’m using this theme: https://themeforest.net/item/oshine-creative-multipurpose-wordpress-theme/9545812

https://www.ads-software.com/plugins/alpine-photo-tile-for-flickr/