Problem with a boss kamasa

Good evening,

The following has happened to me:



I killed the boss Kamasa and just when I killed him I died too, now I can't get the hammer because it's inaccessible and I can't go down to the corridor where it is.



I attach a picture so you can see exactly what happened to me.



The Steam account is belzort1 and the character is called uthariel.



I look forward to hearing from you.