Make sure you have successfully redeemed your code at the TechlandGG website.
If you experience problems with obtaining dockets, visit techlandgg.com, sign in and go to your profile page. There, click your linked account and unlink it. Then link it again, the same way you did the first time.
If you run into trouble while linking your gaming platform to your TechlandGG profile (Error: this platform is already used), contact us at: https://support.techland.pl/.
Also, at the bottom of the main menu screen in Dying Light, you can check if you are connected to the Techland Servers. Make sure it says Techland Servers are online. Only then can you receive dockets. If your NAT type is set to moderate, you will need to change it to open - Dying Light is very NAT-sensitive.
Lastly, if your game mkode is set to hard or nightmare, switch it to normal.