Getting no Error Log File saved to my local directory, and no debug info displayed in the web browser

I may have posted my question too soon!

I found another web page that suggested adding 198.143.164.251 api.wordpress.org to /etc/hosts.

I did that, and now I can at add themes and plugins! And since WordPress isn’t giving me any errors now, I can’t replicate the issues with the debugger.

So it looks like I’ve answered my own question. Hopefully others can find my post useful.