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Notice: Undefined index: force_wall in _fb_social_likebox_preprocess_fb_social_plugin() (line 111 of /htdocs/public/www/sites/all/modules/fb_social/plugins/fb_plugin/likebox.inc).
I'm using fb social plugin to add a likebox to the sidebar of the site, this notice pops up. Live site: www.chirohouthalencentrum.be , By now, I changed the php error_reporting value, so the notice may be hidden already/hopefully (small youth club site, they don't bother small mistakes :p but I'd rather have it gone.. )