No "copy link to selection"

[thistlillo]

I have installed PDF++. It is the only community plugin installed.

When I select some words in the pdf and right click, I see this:

The "copy link to selection" is disabled.

Using
MacOS Sonoma 14.5
Obsidian 1.6.5 (installer 1.6.3)
PDF++ 0.40.8 (enabled)

What am I supposed to check?