On my first installation everything worked fine, including the admin page. I reinstalled again for a different reason. Now I can't access the admin page, but I don't see anything wrong with the Pi-hole, I know that it is still enabled and working. I have read through the other similar questions.
How are you accessing the dashboard? From a browser? Please take a screen snap of what you see on your screen, including the URL you are using to access the page.
JFB,
After 8 hours of troubleshooting, you fixed me already. I was typing the command in the terminal, not the browser. Good news, I typed more terminal commands today, then my entire life, so I learned so much.
Thank you
Newbie