Thank you for your quick reply !
I have just tried what you've told me to do, but unfortunately it still doesn't work... I still can't see the shards icons within the addon settings, or on my map...
I have already tried to download everything fresh, as I uninstalled the whole game, deleted all of the files (including the live folders and everything that was in the ESO folder), installed the whole game from scratch and downloaded the files from here (I do not use minion or any other addon manager). But it doesn't seem to solve the problem
