I have not been here for a while, so i am unsure if it is just something that is happening in the past couple of hours or what. But i am unable to edit the post. I get "Page not found" when i click on 'Edit' links.
I have tried several approaches already, opening in a new tab, actually pasting the edit link into the address bar (thinking that it maybe some sort of AJAX shenanigans. But none of this has helped.
I have found what the actual issue was seconds after posting... it always happens like this for me, i wait for hours trying everything, then then find the solution as soon as i ask for help.
The actual issue was that i have reset my User Agent string to a different value doing something else, and apparently, for whatever reason, StackExchange completely breaks if you are not on a "good" browser. Silly!