It seems like you hitting this following SQL error :

 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 SQL=SELECT i.*,c.alias as c_alias,c.name as c_name, r.name as r_name FROM #__djcf_categories c, #__djcf_items i LEFT JOIN #__djcf_regions r ON r.id=i.region_id WHERE i.date_exp > NOW() AND i.published = 1 AND c.published = 1 AND i.cat_id=c.id AND i.user_id=45 ORDER BY i.date_start DESC limit

After checked in your site, it seems like this app `DJClassifieds Items` causing the issue, I already disable it from backend > Easysocial > application page, it should work fine now.

Regarding this issue, you have to consult with this app developer and see how it goes.