First of all, it is better if you reduce the size of the image on your post as it is too big and your main post is too short so most people will only see your image only as it is hard to see your post.
Back to the main issue, I think we are from the same country, I can access the site without any issue so I think it is related to your ISP.
Maybe you can switch to other ISP if you have, I'm using telkomsel which is known to be the most stricter ISP against gambling but I can open rainbet.