No marks visible. (The Elder Scrolls 5: Skyrim)

Was it originally, or after some manipulation? Is the game clean or mods available? Do you have a licensed version, or a pirate?

This happened after the mod (the mod was removed). Like a pirate.

If after uninstalling the mod the situation has not changed, you can try reinstalling the game. If it didn't work, download another repack or buy a license. If this does not help, the problem may be in the saves.

I have skyrim with the addition ... hearth. I deleted the game and it still worked.

open tasks and put marks on those that you want to do and navigate by the radar ...