Welcome back.
It must have been the https warning. It is a standard ww3 protocol warning telling you that site is unsafe which only means the transmission is not encrypted. We don't make payments here, nor store much confidential data. I was accessing the site w/o https by simply changing the browser settings to allow the site.
This can and may very well happen again. But we have been lucky to get a pretty well coded, laid out, good content platform for free.
All of us who have effective security measures were locked out. The owner of the website has renewed their security certificate, and now we are back.