incompatibilty with SiteOrigin?

Hello,

when I try to call the plugin from a SiteOrigin Editor box it displays :

post_grid_post_settings: a:10:{s:9:”post_skin”;s:4:”flat”;s:19:”custom_thumb_source”;s:102:”http://xxxxxxxx/wordpress/wp-content/plugins/post-grid/assets/frontend/css/images/placeholder.png”;s:17:”font_awesome_icon”;s:0:””;s:23:”font_awesome_icon_color”;s:7:”#737272″;s:22:”font_awesome_icon_size”;s:4:”50px”;s:17:”custom_youtube_id”;s:0:””;s:15:”custom_vimeo_id”;s:0:””;s:21:”custom_dailymotion_id”;s:0:””;s:14:”custom_mp3_url”;s:0:””;s:20:”custom_soundcloud_id”;s:0:””;