`cannot connect to mongoDB

I am having a similar problem which I cannot seem to track down.
Local Compass is connected with the Atlas Cluster and I can edit in either.
But the AI Generate Query which brings up a modal to connect then fails with this message:-

Sign in failed
listen EADDRNOTAVAIL: address not available fe80::1:27097

I don’t understand that message apart from an address is not available.
Can anyone help me with this?