My CORS request started to fail after a security update to Apache2. I can't figure out why?

You can just put Header set Access-Control-Allow-Origin * setting on apache conf or htaccess file it just work Or do the following.

After a lot of trial and error, I got it to work.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.