Forum OpenACS Q&A: Re: (Error: can't read "address": no such variable) after Install OpenACS with NaviServer from Scratch
What I did was just:
- donwload again install-ns.sh from here to ensure I didn't miss any recent change in the script https://raw.githubusercontent.com/gustafn/install-ns/master/install-ns.sh
- made it executable using chmod
- opened the script looking for any line about naviserver version 4.99.11 and changed it to 4.99.12 (lines about version are at the beginning of the script)
- run the script
My dev istance could run ok without any fiddling, just changing the web server underneath.
Maybe you just need to "clear the room" a bit