In most of the Stack Exchange site's Edit Profile & Settings tab, the menu items in the left hand side were loaded without the styles.
Screenshot for reference:
To visit the edit profile page, try the URL: https://meta.stackexchange.com/users/edit/current
After inspect an elements, the CSS classes related to
#side-menu ul li are missing.
Browser and OS details:
Version 58.0.3029.110 (64-bit)
OS: Windows 10 Pro