Freewind: I did. I am pretty sure it is a bug now. The guide says that I need to destroy some barrel to see the hidden cellar. I use aard sign to flow up everything in the house. But there is barrel outside. The entrance seems to be on the left of the house if you stand facing the beach. It is there, I cannot open it. Cannot use the medallion to highlight it either :(
vAddicatedGamer: I don't remember precisely what I did for that quest.
1. I talked to Maverick (forgot to talk to Liva, I don't think it matters though),
2. go inside the house (don't remember if there was anything to find there) but there might have been a new quest phase
3. examined the graves (after you examine all 4 there will be a new quest phase)
4. there is a "click LMB to cast Aard" on the barrels outside the house which lets you into the hidden cellar.
etc...
Edit: Ok I checked my journal. There is a new quest phase upon arriving at the hut. I think Geralt will comment on it or something. After that you do step 4. You can do that even before examining the graveyard.
HTH
I remember visited the house before, I have a habit of exploring the area around. I really dont know if I messed up sth there.
After talking to Maverick, there is an update; after talking to Liva, there is also an update. But when I arrived at the house, there is no update, no comment by Gerald. I examine all 4 graves, no updates.
There is no barrel by the house. The secret door was there already.