I'm still getting the same error. We're only taking the info about raid logs and rankings from World of Logs and at this moment, they are providing us with the info which we show on your character page.
World of Logs is meant to be used with logs from latest raids. Try to go to some normal/heroic Pandaria raid and type /combatlog to start logging the raid, and type /combatlog again when you finish it, then upload the log to World of Logs. Those logs will then be visible on your character page on wow-heroes. If you get ranked on some bosses, your ranks will also be shown on wow-heroes.