Why I can’t use LinkedIn on my MacBook (Updated)

For months I’ve not been able to access LinkedIn from my MacBook. It works fine on my iPad, just not on Safari.
I am not alone.
When I took a look at the code, this is what I found. Nothing.
I’ve seen this a few times on websites that rely too much on Javascript to generate what should be straightforward HTML and CSS.
Degrade Gracefully is a mantra hammered into my when I started web design back in the mid-1990s. It seems it needs to be revived.
Edit: Since posting this, the ability to access LinkedIn from my MacBook has returned.