Not choosing category if there's a space in name

If a category name has a space in it, your plug-in does not return any results. Consider using category-slug instead per the Codex: https://codex.www.ads-software.com/Function_Reference/query_posts

if (is_category('category-slug')):
	 query_posts(array('category_name' => 'my-category-slug', 'posts_per_page' => -1 ));
endif;

Tested by just putting the category slug into the wp_options: widget_rpbc – category_name value.

Also, the “Show credits” checkbox doesn’t stick on Save.

Thanks!

https://www.ads-software.com/extend/plugins/wp-siren-recent-posts-by-category/