Open your privacy to successfully link your Steam account. Make sure that your nickname is 1 to 40 characters long and does not include <> =
Opening access to privacy
If you have problems updating your Steam game on the platform's website, go to your profile home page https://steamcommunity.com/id/*yournickname and click Edit Profile.
Go to the section "My privacy settings".
In each paragraph, select the type of privacy setting "Public"
Game binding
Go to the "Games" section in your personal profile and click the "Edit" button.
Select the game you want and click "Link Account".
Then the login window via Steam will appear. Enter the login and password for your account in the appropriate fields.