I purchased the game.
After season 2 it says you can not advance the game in demo mode.
limited 2 seasons message
the game is activated.
now it says expires aug 31 2023
I pre purchased the game.

That means you did not enter your license key when you started up the game. Click the license key management option on the main menu and replace the generated key with your key from your purchase email and activate it and then you will be all set.