You can try deleting the cookie for [site] then reload the site, if that doesn’t work then try looking on your anti-virus to see if it wasn’t accidentally blacklisted, and if that doesn’t work either then perhaps something is wrong with the site and your ISP and you can try using a vpn to access it... the site works fine for me... well if none of the above works then idk, that’s the 3 common things to do if accessing a site is being troublesome.