wpmudev FrameMarket Theme Tweaks Wordpress

This is a free marketplace theme however on installing I encountered /wp-content/themes/framemarket/library/functions/[login to view URL] on line 244.... This is what line 244 is: // Make sure show thumbnail setting follow main site $show_thumbnail = ( !$mp->get_setting('show_thumbnail') ) ? false : $show_thumbnail; I need theme fully functional and working also i WOULD like minor css/styling done on menu's and few other pages. Really small job and easy job for correct candidate... Main problem is getting pass that error whilst trying to activate global setting... Knoweledge of wordpress Multi site is essential as that is what theme is installed on...Please see site here [login to view URL]