Using your latest version, on my Page tab (at bottom) I see this:
Fatal error: Class 'photohero-home-slider-widget' not found in C:\xampp\htdocs\mywebsite.com\wp-content\plugins\siteorigin-panels\tpl\metabox-panels.php on line 9
Does your plugin handle requires in the widget files? I have this at the top of that widget file:
What do I need to do to get this to work? It seems that Page builder is trying to initialize a widget and is having trouble?