Hi Husna,
Thanks for reaching out although I’m sorry you’re having trouble with your Cloud WordPress demo site.
I took a look and the site is there however it appears that there is some sort of custom rule or redirect that is preventing it from loading. Taking a look it doesn’t appear that anything stands out as an issue. It might be good to delete that instance and create a new one freshly.
Please let us know if you have any further question on this!