Where might I find the directory?
"Simply upload the script either to the directory where your current IP.Board 3.x. installation is (if you want to test if you're ready to upgrade) or anywhere else on your server (if you want to test if you can perform a fresh install) and run it in your web browser. "
I tried to have the PHP updated to 8, but when I did I lost all access to Invision. Consequentially, it has been reverted for now.