Installing and upgrading help

Your web server probably isn't configured for slash arguments. See the Moodle Docs for Nginx.

Hi,

I had the same issue and from the look & feel of your form, I guess you have the same context.
On my side, it was due to the SSL (https). I started to soon the installation, way before the SLL propagation has been finalized. As a result, I ended up with a "mix content" and the admin form was not correctly displayed like the one on your print screen.

You can check if you have the same issue, by checking if the site is secured (see for example : https://www.digicert.com/blog/how-to-know-if-a-website-is-secure) 

What I did:
- deleted all the tables in the database
- deleted all the Moodle files and directories
- start again