Invite doesnt work, I cant add the game to my steam library

[bandit-100]

A friend invited me to Deadlock and , but the reply message with the link to activate the game to my email came without notification, today I tried to go to the link to activate the game, but without success, error: Invalid URL Key.
Here is my steam: https://steamcommunity.com/id/Sickomode1/
Please help me get the game

Thank you