Yesterday I ran into a bug that is preventing me from advancing in the Companions quest line.
Aela gave me objective to kill the lieutenant of the Silver Hand at Valtheim Towers. The quest is called 'Striking the heart' (ID: CR09). When I arrive at the towers, the place is empty. The quest marker points at the floor and there is no one to kill. I've tried manually completing the quest in the console, but it wouldn't allow me to continue the rest of the quest chain as Aela told me I still had a job running for her. I also tried no-clip to see if he might be under the floor, but he is nowhere to be seen.
I have googled the quest and there are several other people with the same problem, but no fix or workaround.
Please let me know if there IS a work around, and if not... look into the quest. I'm really bummed out that I can't progress with the Companions.
Thanks!