Zarine

As the title suggests, I'm unable to link these two accounts for the scavenger hunt unlocks. I get to the point where I click to sign in with Steam, and then it takes me to a 403 Forbidden error page. Any idea why, or how to fix it? Tried several different browsers, and even my phone. I've been looking for information on it, and whether there was an end date for the hunt, but no luck there either.