With Smart Podcast Player enabled, the issue occurs when trying to select an image from the library within the page builder - as a row background image or using the Photo module.
fl-builder.min.js?ver=1.7.5:4 ************************************************************************
2016-03-15 09:47:52.850 fl-builder.min.js?ver=1.7.5:4 Beaver Builder caught the following JavaScript error. If Beaver Builder is not functioning as expected the cause is most likely this error. Please help us by disabling all plugins and testing Beaver Builder while reactivating each to determine if the issue is related to a third party plugin.
2016-03-15 09:47:52.850 fl-builder.min.js?ver=1.7.5:4 “Uncaught TypeError: Cannot read property ‘add’ of undefined” on line 4 of http://towtshow.wpengine.com/wp-content/plugins/bb-plugin/js/fl-builder.min.js?ver=1.7.5.
2016-03-15 09:47:52.851 fl-builder.min.js?ver=1.7.5:4 TypeError: Cannot read property ‘add’ of undefined
at HTMLAnchorElement.FLBuilder._singlePhotoOpened (http://towtshow.wpengine.com/wp-content/plugins/bb-plugin/js/fl-builder.min.js?ver=1.7.5:4:10116)
at m.isFunction.e (http://towtshow.wpengine.com/wp-includes/js/jquery/jquery.js?ver=1.11.3:2:3959)
at null.<anonymous> (http://towtshow.wpengine.com/wp-includes/js/backbone.min.js?ver=1.1.2:1:809)
at null.<anonymous> (http://towtshow.wpengine.com/wp-includes/js/underscore.min.js?ver=1.6.0:5:8146)
at u (http://towtshow.wpengine.com/wp-content/plugins/smart-podcast-player/assets/js/main.min.js?ver=1.3.3:60:5083)
at t.Events.trigger (http://towtshow.wpengine.com/wp-content/plugins/smart-podcast-player/assets/js/main.min.js?ver=1.3.3:60:4457)
at d.(anonymous function) [as trigger] (http://towtshow.wpengine.com/wp-includes/js/media-views.min.js?ver=4.4.2:1:17242)
at wp.media.View.extend.propagate (http://towtshow.wpengine.com/wp-includes/js/media-views.min.js?ver=4.4.2:3:20749)
at wp.media.View.extend.open (http://towtshow.wpengine.com/wp-includes/js/media-views.min.js?ver=4.4.2:3:20157)
at d.(anonymous function) [as open] (http://towtshow.wpengine.com/wp-includes/js/media-views.min.js?ver=4.4.2:3:17371)
2016-03-15 09:47:52.851 fl-builder.min.js?ver=1.7.5:4 ************************************************************************