I’ve tested and I can access the Website without any error.
I am sorry to hear you’re experiencing such an issue.
Unfortunately, if this is a Website which you’re visting but you’re not the owner, I am afraid we might be out of luck. The only thing which you can do is to try to contact Website owner about this, as you’ve stated you’ve already did.
You could give it a try to access it using a VPN or over a TOR, but I do not guarantee because it could also be blocked and restricted.
Obviously the website owner is using Cloudflare and security options available to him to protect his website.
Maybe you have had some bad requests, or the owner decided to deny the requests comming from your country, etc.
Only the owner of the site you’re visiting can tell you why you are unable to access the site. Contacting Support or posting here will not result in an answer.
Neither the Community nor Cloudflare Customer Support can do anything to alter the settings created by the site owner. It’s their site and they determine what traffic they allow or don’t allow, sorry for the issue but we cannot alter the results.