Hello, coming back to this after a few months away...
It was a major frustration that I could not get autocomplete working after updating , rolling back, miniconda, anaconda, everything on any thread I could find.
On coming back to this problem I found that:-
Spyder autocomplete would work fine on my macbook when running windows via parallels.
Spyder autocomplete would work fine on colleagues macbooks (osx).
It was just mine that was a problem....suggesting the osx environment set up.
Environments also seemed to be be identical.
But.. Sublime Text also had problems and reported this as a time out from the localhost.
Investigations into my /etc/hosts . file showed it was empty!
Restored this to 'normal' and .....everything works.
No idea how it got like that and perhaps with more knowledge I would have spotted it earlier.
But...fixed. Wanted to 'close' this thread with a fix for this this problem... at least for my case!
Thanks for the time Carlos.
BR
Andy