Contact your ISP (Internet Service Provider)
Maybe there is an issue with your internet connection which is due to the ISP itself (a problem with the ISP's DNS settings or something else), which prevents you from loading any website (or only a certain website).
Call your internet service provider whose team will troubleshoot and resolve the problem as soon as possible.
When you type an address into your web browser, your computer uses DNS (Domain Name System) to look up and translate that address into a computer-friendly IP address. In other words, the DNS has the role of a librarian, who you can ask for a book. Sometimes, the servers your computer uses to look up that information can go down, thus preventing you from loading the desired web site.