A connection was successfully established with the server, but then an error occurred during the pre-login handshake

Question

I am getting following error when i am trying to connect Production DB from Local Environment.

I was able to connect Production DB before, but suddenly i am getting f

Answer 1

I had this same problem and was having no luck with the suggested fixes. I then came across this article and saw the comment from Mirrh regarding a program called Sendori blocking the LSP. No idea how it got on my computer but there it was and removing it fixed the issue.

If the article doesn't work just check your Programs and uninstall Sendori if you see it.