After one or two unsuccessful tries, I was able to post responses on this site 6-8 weeks ago. Soon after, the current moderator/administrator posted an apology, and admitted that the site was still a "work in progress."
I recently posted a request for a practice text on yamantaka.com and a very kind person responded by sending me the text in a matter of days!! (Thanks, M.)
3-4 months ago the moderator of the Chakrasamvara site (David) posted a very informative answer to a question I had on Six-Session Guru Yoga.
I think one can still use the sites to communicate with other practitioners, but the download functions (one of the most useful aspects) seem to be disabled or "on the fritz." Hopefully this is temporary. All three sites were created & administered by Wolfgang Saumweber of blessed memory. With his passing, there is an understandable period of adjustment and transition. I would urge all interested folks to support the sites monetarily, to the extent they are able.