They are exactly the same, very strange problem

Hello, I have been having some trouble signing in to the website with Steam, to do event. When I try to login at the top right corner of the website, I am redirected to steam login page as expected, click on "sign in" and I just get redirected back to Masangsoft-Microvolts website, not signed in. The button saying "Sign in through Steam" is still there and I am unable to participate in the social media event. I have noticed that a lot of people also have this issue, and we didn't get a solution yet. What I tried to do: - Using incognito tab and clearing browser data - Using completely different browser and device, including a different computer and my phone - Removing steam authenticator I also tried using another steam account and it worked just fine, but unable to do so on my main account. Very strange but just want to get some help, and participate in the event, among many other players that have the same issue.