Falscaar (The Elder Scrolls 5: Skyrim)

In short, download Falskar, started a new game, came to Riften, a bum came up and told me to check the cave, well, then I scored and went to the thieves guild, now I went to complete the quest. Filled up the centurion, collected the belongings of the mercenaries, went to the main one on which the marker, but in the end, when taking all the things, the marker is not removed from his body. Tried using the cube myself, but nothing worked. Mods are mainly based on graphics and small subtleties of the game. Like Headshot from a bow and not picking up trash. How can an option be due to the UI? Because I watched the passage and everyone has an original interface ...