I chose my Safari web browser to finish the necessary installation steps of: 14.0.0-A3. When it was time to enter my admin email I accidently entered an email WITHOUT the dot in my email address and it was accepted. I was allow to continue the installation.

I then went on my Firefox web browser (I have a habit of using two different web browsers) and attempted to login as the admin. I was successful. I reentered my email and password numerous times, no luck in gaining access.

Luckily, I kept my Safari web browser open and I was still inside my admin section. I navigated to: Settings / Site Settings and saw my error, I had forgotten the dot in my admin's email address. I fixed it. I kept my Safari web browser, to play it safe, and then I went to my Firefox web browser and proceeded to login to my site as admin, I was successful.

Please correct this, don't allow the installation to accept an incorrect entered email address. I don't recall installation asking me to enter my admin's email twice to verify my email. Having to enter the admin email twice correctly, will prevent this issue from happening.