For Far Cry games, please follow this guide.
1
Open SteamDB and search for your game
2
In the side panel, click on Depots
3
Click on the ID of the configuration that’s named as the game
Example for The Crew 2:
4
In the Files section
Paste uplay_r1_loader64.dll in the search field.
If it appears in the list
If it says No matching records found
5
Download the patched .dll file
6
Drag the file into the game’s folder
Open the game’s folder (How to open Steam game's folder?), and drag the file you downloaded into the game’s folder. When a window like this pops up:
Click Replace the file in the destination.
7
Congrats!
If you’ve followed all of the steps correctly, you should be able to play your Ubisoft game.