Well lately I'm on a massive questing spree! However there is 1 quest I can't seem to progress.

That quest is, as you can read above, The Path of Glouphrie.

 

This is what the wikia guide says:

 

Search a chest (you should receive crystalline disks). You can use the drop trick to obtain more.

Head back to Golrie and talk about the anti-illusion device. He will mention a tunnel on the east side.

Head to the Eastern part of the cave, and crawl into the tunnel on the Northern wall. (If you get the message You don't want to start crawling around in tunnels unless you know where you're going!, then you'll need to talk to Golrie in the west room first.) Also note that Summoning familiars are not allowed in here.

 

Once through, you will have to deal with a monolith puzzle. All you have to do is move the monoliths a specific direction(s) and search all the crates and chests that you free up.

First, push the first monolith North, then walk past it and search the chest to receive some crystalline disks.

Second, walk over to the next set of monoliths and push the South-Western monolith North, then push the North-Western monolith East. Now search the chests to receive some more crystal disks, a key, and Yewnock's notes. (You may have to search a chest more than once to get both the key and Yewnock's notes.)

 

All parts I bolded I can do. However once I'm in that room and moved the monoliths and have searched the chests. The chests end up empty and I cannot solve a part further down the quest.

 

Anyone got an idea what went wrong?

Check your quest journal on the quest tab and make sure you're suppose to be in there at the moment and not supposed to talk to somebody else before-hand. If not, try re-logging and trying it again.