Raid boss

I go into reminders it says no raid boss available but when I go into activity and click on raid boss it' says I can start searching for my next boss. I'm assuming it's a big but can i still find my boss I'm 5 essence away from gryphion and have the monsters ready. I need this sorting ASAP.

[Koenaj]

No Raid Boss Available means that there is no Boss currently there for you to attack.
You can still find your Boss though, there's a 24 hours cooldown after you killed your last one.

Thanks problem has been sorted now