The user menu is not fully visible. The buttons for scrolling it down and dismiss the notifications is out of the screen. It’s not possible to scroll to them.
I believe there is a SCSS issue causing the height of the menu to be too big.
Here are the inline Markdown images:
Have you tried safe mode?
Thank you. I didn’t know safe mode was a thing.
As I have determined, it’s unfortunately the forum theme causing the issue.
You mean fortunately! 
It means you can track down the issue and solve it 
Very true. It means I can fix it. A little challenging but I can do it.
Okay there’s something a little odd. In safe mode the variable --header-offset is set to “64px”. In regular mode, it’s not set to a value. Judging from the PR, this is the intended outcome and I need to define it on my theme?
This is weird. The variable should be calculated regardless of the theme you use.
I have a custom header (HTML + CSS) and on my site and --header-offset is correctly set to another value than the default one.
I’ve been meaning to use a simpler theme. Maybe switch over from SASS to regular CSS while I’m at it.
