If you are on Mac, its because Firaxis changed the location of save files 
Copy “Saves” and “Mods” folder inside the “Sid Meier” folder (which as u see is created 2 days ago after their update) and it should work.
You also need to change PYDT client settings to:
/Users/[YOUR_USER_NAME]/Library/Application Support/Sid Meier’s Civilization VI/Sid Meier’s Civilization VI/Saves/Hotseat
