Widget not showing in sidebar

Ik have the same problem. The widget is not showing in the sidebar. What can be wrong?

Hi,

Please provide your site URL and we will try to help you with this.

Regards,
Oleg

The URL is: https://v2.der-clubschiffprofi.de

I have to correct my problem: the widget shows a price slider already.
Now I want to filter different categories. How can I show the category filter widget?

Free version of plugin didn’t have filters for categories and tags.

Regards,
Oleg