Cleared your cache? Are you using a VPN? Is there anything you've tried or have you installed any updates recently?
Aight. It's usually something like that. Clear your history. Sometimes w/my VPN on, I can't get connected to this site. I turn off connect, then turn back on. That sometimes helps. If updates done recently, maybe try to roll back to an earlier date. What operating system? Also, have you ever edited your hosts file. At a time when some anons were editing hosts files, which fixed the prob for me, randomly unable to connect to this site. I deleted all the entries for this site from my hosts file and suddenly was able to access. I was down for a whole week before I figured that out. Frustrating. kek
After clearing history, x outta browser and then open fresh. If that don't work, try the VPN turn off then back on after loading site. If all that fails, reset your internet. Just turn off and leave unplugged for 10 minutes. Also if using VPN, try another location if you have a choice.