Box won't launch

Plugin is installed and activated, and I’ve tried default as well as customized settings. Regardless I get this in the console:

TypeError: jQuery(stb.stbElement).offset() is null
https://www.colespondstore.com/wp-content/plugins/dreamgrow-scroll-triggered-box/stb_init.js?ver=1.2
Line 17

//line in question:
stb.boxOffset = jQuery(stb.stbElement).offset().top;

https://www.ads-software.com/extend/plugins/dreamgrow-scroll-triggered-box/