Can’t install Local REST API plugin

I’m trying to pair the Rest API with the Obsidian Web Clipper to send webpages as new notes to a certain folder

What I’m trying to do

The Rest Api seems to be connected properly (I’ve got a green shield next to the API Key number)

Yet the Web Clipper shows an Error message in the bookmark, and when I try to clip pages I get this error message:
Error

Could not send content to Obsidian: (Error Code 40400) Not Found

Would be very grateful if anyone can help me out
Thanks