User blog comment:Danyboy900/Hollow level 0, Embered, summon sign unrestricted and still cant summon anything, no peps no npc no nothing/@comment-2600:8807:5782:EE00:E4B7:3F4E:2ED0:385F-20180702021650

also might not be the correct level. its possible there are no players in his level range that can be summoned by him that are also looking to fight that boss. maybe level up a bit?