Doesn't show categories

I created a costum post type of the plugin “Store Locator”, and it worked just fine, when I had this code on my page: [cpt_list post_type=”store_page” posts_per_page=”500″ list_title=”false” title_links=”true” show_post_content=”false”]

Now, I wanted to sort after categories and added a category. [cpt_list post_type=”store_page” posts_per_page=”500″ category=”Wuppertal” list_title=”false” title_links=”true” show_post_content=”false”]

This doesn’t work, but it says “No entries found”, which is why I assume, that it somehow works.

Do you have any idea, what could be the problem?

Did you have problems with categories before?

Thanks and and regards,
Lisa

https://wordpress.org/plugins/cpt-editor/