Welcome back to Wikivorce, although I'm sorry have a need to be here again.
The chat room is no longer available - it hadn't been used for many years. People now tend to converse via social media platforms. The Wiki you remember from many years ago was at a time when Facebook and the like were in its' infancy, and to a large extent, Wiki was the precursor to the social media as we know it today.
You can still post messages and connect with others as well as sending pms if you want to talk off-forum.