Aha! With nothing to lose (SD card backed-up) I decided to start over on installing the /var/www/sprinklers directory.
I typed into the RPi ssh remote terminal:
sudo /bin/rm -rf /var/www/sprinklers
sudo git clone https://github.com/salbahra/OpenSprinkler-Controller.git /var/www/sprinklers
cd /var/www/sprinklers
sudo chmod 777 *
In my iPhone browser I typed: 192.168.1.12/sprinklers
In the New Install screen I noticed the text, “You can also specify a port by using IP:Port”, above the “Open Sprinkler IP” field. So, I typed: 192.168.1.12:8086.
And it seem to have grabbed all the info and seems to be working! NOW the fun begins! Looking forward to this user interface. AMAZING!