Hi, I tried the game key again, the code works but the product cannot be activated from Turkey. There is definitely a region protection. The site moderator asked me to tell you about the situation. They asked for your assistance in finding a solution Otherwise, according to the site rules, I have to mark it as "Not Received".

I found an explanation, you can check it.
https://www.steamgifts.com/discussion/uLeRy/humble-bundle-rawcember-to-remember/search?page=2