I've had that issue before, it's really frustrating. When I get the "this site can't be reached" error, I usually try checking my internet connection first, making sure I'm connected to the right network. If that's not the problem, I clear my browser's cache and cookies, sometimes that fixes the issue. You could also try restarting your router or checking if the site is down for everyone, not just you. If none of those work, you might want to check your DNS settings or try using a different browser to see if the problem is browser-specific.