I cleared my cache and cookies earlier. It didn't fix the issue. Can't try again for a few hours - - my wife and are out. I am responding using Firefox on my Android phone (which seemed to work earlier).
I have the link https://www.hometheaterforum.com/community/ set as my home page. An hour or so ago, when accessing that page I am no longer logged into the forum. Attempting to login generates the error message "Oops. We ran into some problems. Security error occurred. Please press back, refresh...