Wordpress Cleanup Wordpress URL?

I did not know what to call this subject in order to look it up so I apologize if this subject has been asked before.

I would like to know how to clean-up the URL of the WordPress websites that is created with menu item 22

e.g. Die von Ihnen angeforderte Subdomain ist nicht konfiguriert?v=0bf09fdfab3c

Is there something in the Nginx domain conf that would allow me to hide "v=0bf09fdfab3c".

Let me know what I can do, thanks' everyone!