Why are Online parallel quests not clearing?

I’m doing some of the hard quests online, and looking for help actually clearing them. For some reason, after I complete them, they do not appear as cleared – I get a message saying “finished” and “clear”, but on the results screen, I’m awarded with everything except the rank (eg exp., Zeni, etc). The rank stays black and is not awarded. I’ve tried different quests with several characters, including the hero, all of which ended with the same results. I try to always use the hero because I thought that that was preventing me from clearing the quests, but obviously I’m doing something wrong.

Does anybody knows why this is happening? Has this happened to anyone else?

For reference, I have already finished the main campaign (with the exception of the thing with the five time crystals/shards which I’m currently trying to get).