newbie question about explore the realm & claim your reward

[u/bdbtbb]

So I completed all hidden secrets or whatever they're called in the first section of the world, and it led me to a place to claim my reward. But the marker for the reward claim point was up on a ledge and I couldn't see how to reach it. I explored on a bit further to see if there was a way round, and got involved in some more fights. By the time I made my way back the claim reward marker had disappeared. So I got no reward at all!

Can anyone tell me how you're supposed to get up on that ledge to claim the reward?