Are you running a VPN? I have had this happen a few times. Turning it off and clearing cache / cookies seemed to clear it up. I always assumed it was VPN related because it only happened when it was on.
Nope, no VPNs on, now I’m in work I’m banned on my office machine as well, but phone still works fine. Moderators?
If it's at work then it's probably blocked by your IT department's policies. Our policies here are quite strict but I'm still able to log on to this site. If it's not that, do like others have said or try a different browser.
That reminds me of when i was in high school (20 years ago) I got flagged for going to partsexpress.com..... they later changed their domain to parts-express.com