Thank you bb-77, the Beginner’s Guide to Nano was very helpful. Also found another document that helped me
Using the nano command in the Truenas12 Shell CLI, I was able see and edit the contents of Config.php
I added a new line with the http:// IP address for the NextCloud plugin as shown in the Truenas12 “Plugins” screen, 192.168.1.217:8282, and attempted to access NextCloud from the Plugins “Manage” option in Truenas12. I got an error message warning me of a “Warning: Potential Security Risk Ahead”. I then edited Config.php again, this time changing the new IP address to the https:// IP address from the error message screen, 192.168.1.8283. I then accessed NextCloud again and got the same error warning message.
Looks Like there is still something not right. What can I change to satisfy my Firefox web browser that the IP address is secure?
Making progress thanks to your assistance, really appreciate your help.