I can understand there are many idiots on internet, but I'm not a spammer. After you told me nginx, I see better the error page, and it's an Apache error page. The error is on https links. When I see the page with http it's works, maybe you should configure better nginx ssl. I have attached a screenshot
Are many days, I got always "Internal Server Error" in wordpress site of dangerous prototypes. I have no error with forum, which work very well. Sometimes the errors disappear for a short period, but after they return. Could you resolve? If you want I can help you to analize the issue. Maybe there are some plugins with geo policy. I never written because always I think "today will resolve", but this day never arrive.