Have you tried completely shutting down your game & restarting it?
Can you please provide us with a screenshot?
Have you checked out the relevant Wiki pages, quests, maps, videos, guides, walkthroughs & hidden gifts.
You can easily find the solutions to puzzles if you check out the walkthroughs & maps.....everything is clearly & concisely highlighted.... including hidden gifts.
In this scenario it is much more easier to consult, study & follow the maps.....instead of the videos.
VIDEO - PC
VIDEO - Mobile
Fan based websites