Can't Finish Quest "a Journey Beyond"

I am in the Stage 18, when I have to find Aledar. I have already found aledar inside the worm, but somehow, when I right-clicked him, I was teleported to a tower with a telescope (the same of a secret discovery about meteors coming). --> How can I return to Aledar inside the worm?? pls help me

note: I have already tried to leave the world, join again and stand under the worm hole but it doesn't worked., like shown in the images below.

 

Go get Lucio's skull and Elphaba's chestplate again, and try to use those two to lure the worm again.