Undefined Index Error

I keep getting this PHP error on my pages, it ads anywhere from.75 seconds to 5 seconds load times to my pages’
Undefined index: essb_w_force 1 wp-content/plugins/easy-social-share-buttons3/lib/core/widgets/essb-share-widget.php:34

any suggestions would be appreciated. have disabled all pugins and it still shows.

https://ww.wp.xz.cn/plugins/easy-social-share-buttons/