Marketplace in Standalone version not working

I have gotten my access credentials to the marketplace in the Standalone edition. However, I can’t log into it. I have tried on both Linux and Windows, and when I do i get “Service temporarily unavailable” and then the service crashes and I have to restart it. I have tried to repeat the process several days in a row so I’m sure it’s not a temporary issue. I have search in your documentaion, the internet and the forums, and have not found anything about it. What do I have to do to be able to use the marketplace in the Standalone version except entering correct credentials?
Best regards,