The default user pass is neo4j if you didn't change it.
I think you've installed several versions together and you do not put the right port to connect.
Like @mojtaba_tmj, I also suspect it's not the right port. Typically this would be 7687 instead of 11002 for Bolt, with the default configuration.
To see which port it is, you can click the 'Manage' button on the database in Desktop and then you'll see a screenshot like this. You're looking for the "Bolt port":