If you go to the blog, and click on "COMMUNITY" from the menu on top, it brings to you a page that says:
"Community
After 14 years, it was announced in early May 2018 that the Ehell forum would be closing. Large forums are expensive to operate on servers and until recently the forum had paid for itself from Google Adsense ads. However, revenue had been declining in the past two years and the forum can not longer sustain it.
Longtime members chose to create and migrate to a new forum. It uses the same forum software, mostly same topics, the same familiar feel and many posters you will recognize. It is not affiliated with Etiquette Hell LLC in any way. It can be found here."
However, the board is still open - I had it saves as a bookmark so I was able to access it that way.