I thought I had just made some CSS adjustments until now, but somehow the sticky menu is broken. When I scroll down, the change to the sticky menu with the white background does not happen. It just stays transparent.
When I use inspect element and compare it with the demo, I see a piece of code for the sticky header missing:
<header id="header" class>
instead of <header id="header" class="sticky">
The temp login is not working it seems , can you pls check?
Have you updated theme? If not pls update your theme to newest version and see if that helps.