MDTF Widget missing

Hello,

after an update the MDTF widget is missing, therefore i can’t use the sidebar. All the MDTF categories and filters are still active though. I can even use the shortcode. But I do need the widget.

Is there any easy solution for this problem?

Thanks and best,
René

https://ww.wp.xz.cn/plugins/wp-meta-data-filter-and-taxonomy-filter/