I'd tried to respond to a post from November and after clicking "save", I got a 404 error.
I tried to send a PM, got the same thing. So, I went back a page and linked on that member to PM them and was able to do so.
Just an FYI, I do not expect any kind of a fix, pretty sure you folks are busy.
Those who have no idea what they are doing have no idea that they don't know what they are doing. - John Cleese