Problom with shadow quest

I'm having a problem with the shadow quest
I started the shadow quest and I defeated lily but then I it didn't tell me what to do next I went to ssundee video and I saw that I need to defeat sekk and I went to his place and his not there it happened to me yesterday and I don't know what to do pls help me as fast as you can .

my name on minecraft is nir18388
I'm on server 14

 

You can check /questlog to see where you are at. There are also guides for the shadow quest in the forums!

 

I know where I am at I need to defeat sekk but his not in his place

 

Which server are you at, maybe I can come online and help?

 

I'm in server 14